Summarized test results:
CSS3 Text, Line break, OP, CL and NS

Intended audience: users, XHTML/HTML coders (using editors or scripting), script developers (PHP, JSP, etc.), CSS coders, Web project managers, and anyone who wants to know how well browsers support the line breaking properties of Unicode characters.

Updated

These tests check the default behavior of characters against the expectations in the Unicode Standard Annex, version 5.1.0. The two-letter abbreviations are conventions for property names in the Unicode Standard. Non-tailorable characters have normative behavior in the Unicode Standard that applies in all normal circumstances. For more information about expected line break behavior and line break classes, see Unicode Standard Annex #14 Line Breaking Properties.

Note that the snapshot summaries of these test results are for released versions of the browsers tested. Versions that are still in development may provide better support for these features. The tests themselves do not test any vendor prefixes.

results

The tables show results for tests run on the date shown. Above the tables are summaries of the results at that date. The table data may be more up-to-date than the summary. If the tables contain some incorrectly scored tests, or tests that relate to non-released versions of browsers, these are not included in the summary.

To see the test, click on the link in the left-most column. To see detailed results for a single test, click on the link in the right-most column.

OP: Opening punctuation

Snapshot summary, 2014-02-18
Firefox 27.0, Chrome 32.0.1700.107, Safari 6.1.1, Internet Explorer 9, Opera 19.0

Apart from 23B4 TOP SQUARE BRACKET, support for the 65 opening punctuation characters was as expected for Chrome, Opera and Safari.

Firefox and Internet Explorer, on the other hand, tended to support only the more commonly used characters, with IE slightly ahead of Firefox.

Test link Assertion Details
0028 LEFT PARENTHESIS Because it has OP Opening Punctuation property, the browser will not leave 0028 LEFT PARENTHESIS at the end of a line.
005B LEFT SQUARE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 005B LEFT SQUARE BRACKET at the end of a line.
007B LEFT CURLY BRACKET Because it has OP Opening Punctuation property, the browser will not leave 007B LEFT CURLY BRACKET at the end of a line.
0F3A TIBETAN MARK GUG RTAGS GYON Because it has OP Opening Punctuation property, the browser will not leave 0F3A TIBETAN MARK GUG RTAGS GYON at the end of a line.
0F3C TIBETAN MARK ANG KHANG GYON Because it has OP Opening Punctuation property, the browser will not leave 0F3C TIBETAN MARK ANG KHANG GYON at the end of a line.
169B OGHAM FEATHER MARK Because it has OP Opening Punctuation property, the browser will not leave 169B OGHAM FEATHER MARK at the end of a line.
201A SINGLE LOW-9 QUOTATION MARK Because it has OP Opening Punctuation property, the browser will not leave 201A SINGLE LOW-9 QUOTATION MARK at the end of a line.
201E DOUBLE LOW-9 QUOTATION MARK Because it has OP Opening Punctuation property, the browser will not leave 201E DOUBLE LOW-9 QUOTATION MARK at the end of a line.
2045 LEFT SQUARE BRACKET WITH QUILL Because it has OP Opening Punctuation property, the browser will not leave 2045 LEFT SQUARE BRACKET WITH QUILL at the end of a line.
207D SUPERSCRIPT LEFT PARENTHESIS Because it has OP Opening Punctuation property, the browser will not leave 207D SUPERSCRIPT LEFT PARENTHESIS at the end of a line.
208D SUBSCRIPT LEFT PARENTHESIS Because it has OP Opening Punctuation property, the browser will not leave 208D SUBSCRIPT LEFT PARENTHESIS at the end of a line.
2329 LEFT-POINTING ANGLE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 2329 LEFT-POINTING ANGLE BRACKET at the end of a line.
23B4 TOP SQUARE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 23B4 TOP SQUARE BRACKET at the end of a line.
2768 MEDIUM LEFT PARENTHESIS ORNAMENT Because it has OP Opening Punctuation property, the browser will not leave 2768 MEDIUM LEFT PARENTHESIS ORNAMENT at the end of a line.
276A MEDIUM FLATTENED LEFT PARENTHESIS ORNAMENT Because it has OP Opening Punctuation property, the browser will not leave 276A MEDIUM FLATTENED LEFT PARENTHESIS ORNAMENT at the end of a line.
276C MEDIUM LEFT-POINTING ANGLE BRACKET ORNAMENT Because it has OP Opening Punctuation property, the browser will not leave 276C MEDIUM LEFT-POINTING ANGLE BRACKET ORNAMENT at the end of a line.
276E HEAVY LEFT-POINTING ANGLE QUOTATION MARK ORNAMENT Because it has OP Opening Punctuation property, the browser will not leave 276E HEAVY LEFT-POINTING ANGLE QUOTATION MARK ORNAMENT at the end of a line.
2770 HEAVY LEFT-POINTING ANGLE BRACKET ORNAMENT Because it has OP Opening Punctuation property, the browser will not leave 2770 HEAVY LEFT-POINTING ANGLE BRACKET ORNAMENT at the end of a line.
2772 LIGHT LEFT TORTOISE SHELL BRACKET ORNAMENT Because it has OP Opening Punctuation property, the browser will not leave 2772 LIGHT LEFT TORTOISE SHELL BRACKET ORNAMENT at the end of a line.
2774 MEDIUM LEFT CURLY BRACKET ORNAMENT Because it has OP Opening Punctuation property, the browser will not leave 2774 MEDIUM LEFT CURLY BRACKET ORNAMENT at the end of a line.
27E6 MATHEMATICAL LEFT WHITE SQUARE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 27E6 MATHEMATICAL LEFT WHITE SQUARE BRACKET at the end of a line.
27E8 MATHEMATICAL LEFT ANGLE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 27E8 MATHEMATICAL LEFT ANGLE BRACKET at the end of a line.
27EA MATHEMATICAL LEFT DOUBLE ANGLE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 27EA MATHEMATICAL LEFT DOUBLE ANGLE BRACKET at the end of a line.
2983 LEFT WHITE CURLY BRACKET Because it has OP Opening Punctuation property, the browser will not leave 2983 LEFT WHITE CURLY BRACKET at the end of a line.
2985 LEFT WHITE PARENTHESIS Because it has OP Opening Punctuation property, the browser will not leave 2985 LEFT WHITE PARENTHESIS at the end of a line.
2987 Z NOTATION LEFT IMAGE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 2987 Z NOTATION LEFT IMAGE BRACKET at the end of a line.
2989 Z NOTATION LEFT BINDING BRACKET Because it has OP Opening Punctuation property, the browser will not leave 2989 Z NOTATION LEFT BINDING BRACKET at the end of a line.
298B LEFT SQUARE BRACKET WITH UNDERBAR Because it has OP Opening Punctuation property, the browser will not leave 298B LEFT SQUARE BRACKET WITH UNDERBAR at the end of a line.
298D LEFT SQUARE BRACKET WITH TICK IN TOP CORNER Because it has OP Opening Punctuation property, the browser will not leave 298D LEFT SQUARE BRACKET WITH TICK IN TOP CORNER at the end of a line.
298F LEFT SQUARE BRACKET WITH TICK IN BOTTOM CORNER Because it has OP Opening Punctuation property, the browser will not leave 298F LEFT SQUARE BRACKET WITH TICK IN BOTTOM CORNER at the end of a line.
2991 LEFT ANGLE BRACKET WITH DOT Because it has OP Opening Punctuation property, the browser will not leave 2991 LEFT ANGLE BRACKET WITH DOT at the end of a line.
2993 LEFT ARC LESS-THAN BRACKET Because it has OP Opening Punctuation property, the browser will not leave 2993 LEFT ARC LESS-THAN BRACKET at the end of a line.
2995 DOUBLE LEFT ARC GREATER-THAN BRACKET Because it has OP Opening Punctuation property, the browser will not leave 2995 DOUBLE LEFT ARC GREATER-THAN BRACKET at the end of a line.
2997 LEFT BLACK TORTOISE SHELL BRACKET Because it has OP Opening Punctuation property, the browser will not leave 2997 LEFT BLACK TORTOISE SHELL BRACKET at the end of a line.
29D8 LEFT WIGGLY FENCE Because it has OP Opening Punctuation property, the browser will not leave 29D8 LEFT WIGGLY FENCE at the end of a line.
29DA LEFT DOUBLE WIGGLY FENCE Because it has OP Opening Punctuation property, the browser will not leave 29DA LEFT DOUBLE WIGGLY FENCE at the end of a line.
29FC LEFT-POINTING CURVED ANGLE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 29FC LEFT-POINTING CURVED ANGLE BRACKET at the end of a line.
3008 LEFT ANGLE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 3008 LEFT ANGLE BRACKET at the end of a line.
300A LEFT DOUBLE ANGLE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 300A LEFT DOUBLE ANGLE BRACKET at the end of a line.
300C LEFT CORNER BRACKET Because it has OP Opening Punctuation property, the browser will not leave 300C LEFT CORNER BRACKET at the end of a line.
300E LEFT WHITE CORNER BRACKET Because it has OP Opening Punctuation property, the browser will not leave 300E LEFT WHITE CORNER BRACKET at the end of a line.
3010 LEFT BLACK LENTICULAR BRACKET Because it has OP Opening Punctuation property, the browser will not leave 3010 LEFT BLACK LENTICULAR BRACKET at the end of a line.
3014 LEFT TORTOISE SHELL BRACKET Because it has OP Opening Punctuation property, the browser will not leave 3014 LEFT TORTOISE SHELL BRACKET at the end of a line.
3016 LEFT WHITE LENTICULAR BRACKET Because it has OP Opening Punctuation property, the browser will not leave 3016 LEFT WHITE LENTICULAR BRACKET at the end of a line.
3018 LEFT WHITE TORTOISE SHELL BRACKET Because it has OP Opening Punctuation property, the browser will not leave 3018 LEFT WHITE TORTOISE SHELL BRACKET at the end of a line.
301A LEFT WHITE SQUARE BRACKET Because it has OP Opening Punctuation property, the browser will not leave 301A LEFT WHITE SQUARE BRACKET at the end of a line.
301D REVERSED DOUBLE PRIME QUOTATION MARK Because it has OP Opening Punctuation property, the browser will not leave 301D REVERSED DOUBLE PRIME QUOTATION MARK at the end of a line.
FD3E ORNATE LEFT PARENTHESIS Because it has OP Opening Punctuation property, the browser will not leave FD3E ORNATE LEFT PARENTHESIS at the end of a line.
FE35 PRESENTATION FORM FOR VERTICAL LEFT PARENTHESIS Because it has OP Opening Punctuation property, the browser will not leave FE35 PRESENTATION FORM FOR VERTICAL LEFT PARENTHESIS at the end of a line.
FE37 PRESENTATION FORM FOR VERTICAL LEFT CURLY BRACKET Because it has OP Opening Punctuation property, the browser will not leave FE37 PRESENTATION FORM FOR VERTICAL LEFT CURLY BRACKET at the end of a line.
FE39 PRESENTATION FORM FOR VERTICAL LEFT TORTOISE SHELL BRACKET Because it has OP Opening Punctuation property, the browser will not leave FE39 PRESENTATION FORM FOR VERTICAL LEFT TORTOISE SHELL BRACKET at the end of a line.
FE3B PRESENTATION FORM FOR VERTICAL LEFT BLACK LENTICULAR BRACKET Because it has OP Opening Punctuation property, the browser will not leave FE3B PRESENTATION FORM FOR VERTICAL LEFT BLACK LENTICULAR BRACKET at the end of a line.
FE3D PRESENTATION FORM FOR VERTICAL LEFT DOUBLE ANGLE BRACKET Because it has OP Opening Punctuation property, the browser will not leave FE3D PRESENTATION FORM FOR VERTICAL LEFT DOUBLE ANGLE BRACKET at the end of a line.
FE3F PRESENTATION FORM FOR VERTICAL LEFT ANGLE BRACKET Because it has OP Opening Punctuation property, the browser will not leave FE3F PRESENTATION FORM FOR VERTICAL LEFT ANGLE BRACKET at the end of a line.
FE41 PRESENTATION FORM FOR VERTICAL LEFT CORNER BRACKET Because it has OP Opening Punctuation property, the browser will not leave FE41 PRESENTATION FORM FOR VERTICAL LEFT CORNER BRACKET at the end of a line.
FE43 PRESENTATION FORM FOR VERTICAL LEFT WHITE CORNER BRACKET Because it has OP Opening Punctuation property, the browser will not leave FE43 PRESENTATION FORM FOR VERTICAL LEFT WHITE CORNER BRACKET at the end of a line.
FE47 PRESENTATION FORM FOR VERTICAL LEFT SQUARE BRACKET Because it has OP Opening Punctuation property, the browser will not leave FE47 PRESENTATION FORM FOR VERTICAL LEFT SQUARE BRACKET at the end of a line.
FE59 SMALL LEFT PARENTHESIS Because it has OP Opening Punctuation property, the browser will not leave FE59 SMALL LEFT PARENTHESIS at the end of a line.
FE5B SMALL LEFT CURLY BRACKET Because it has OP Opening Punctuation property, the browser will not leave FE5B SMALL LEFT CURLY BRACKET at the end of a line.
FE5D SMALL LEFT TORTOISE SHELL BRACKET Because it has OP Opening Punctuation property, the browser will not leave FE5D SMALL LEFT TORTOISE SHELL BRACKET at the end of a line.
FF08 FULLWIDTH LEFT PARENTHESIS Because it has OP Opening Punctuation property, the browser will not leave FF08 FULLWIDTH LEFT PARENTHESIS at the end of a line.
FF3B FULLWIDTH LEFT SQUARE BRACKET Because it has OP Opening Punctuation property, the browser will not leave FF3B FULLWIDTH LEFT SQUARE BRACKET at the end of a line.
FF5B FULLWIDTH LEFT CURLY BRACKET Because it has OP Opening Punctuation property, the browser will not leave FF5B FULLWIDTH LEFT CURLY BRACKET at the end of a line.
FF5F FULLWIDTH LEFT WHITE PARENTHESIS Because it has OP Opening Punctuation property, the browser will not leave FF5F FULLWIDTH LEFT WHITE PARENTHESIS at the end of a line.
FF62 HALFWIDTH LEFT CORNER BRACKET Because it has OP Opening Punctuation property, the browser will not leave FF62 HALFWIDTH LEFT CORNER BRACKET at the end of a line.

CL: Closing punctuation

Snapshot summary, 2014-02-18
Firefox 27.0, Chrome 32.0.1700.107, Safari 6.1.1, Internet Explorer 9, Opera 19.0

As for the opening characters, 23B5 BOTTOM SQUARE BRACKET was the exception for support of the 72 closing characters by Chrome, Opera and Safari.

Again, Firefox and Internet Explorer tended to support only the more commonly used characters.

Test link Assertion Details
3001 IDEOGRAPHIC COMMA Because it has a CL Closing Punctuation property, the browser will not leave 3001 IDEOGRAPHIC COMMA at the beginning of a line.
3002 IDEOGRAPHIC FULL STOP Because it has a CL Closing Punctuation property, the browser will not leave 3002 IDEOGRAPHIC FULL STOP at the beginning of a line.
FE50 SMALL COMMA Because it has a CL Closing Punctuation property, the browser will not leave FE50 SMALL COMMA at the beginning of a line.
FE52 SMALL FULL STOP Because it has a CL Closing Punctuation property, the browser will not leave FE52 SMALL FULL STOP at the beginning of a line.
FF0C FULLWIDTH COMMA Because it has a CL Closing Punctuation property, the browser will not leave FF0C FULLWIDTH COMMA at the beginning of a line.
FF0E FULLWIDTH FULL STOP Because it has a CL Closing Punctuation property, the browser will not leave FF0E FULLWIDTH FULL STOP at the beginning of a line.
FF61 HALFWIDTH IDEOGRAPHIC FULL STOP Because it has a CL Closing Punctuation property, the browser will not leave FF61 HALFWIDTH IDEOGRAPHIC FULL STOP at the beginning of a line.
FF64 HALFWIDTH IDEOGRAPHIC COMMA Because it has a CL Closing Punctuation property, the browser will not leave FF64 HALFWIDTH IDEOGRAPHIC COMMA at the beginning of a line.
0029 RIGHT PARENTHESIS Because it has a CL Closing Punctuation property, the browser will not leave 0029 RIGHT PARENTHESIS at the beginning of a line.
005D RIGHT SQUARE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 005D RIGHT SQUARE BRACKET at the beginning of a line.
007D RIGHT CURLY BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 007D RIGHT CURLY BRACKET at the beginning of a line.
0F3B TIBETAN MARK GUG RTAGS GYAS Because it has a CL Closing Punctuation property, the browser will not leave 0F3B TIBETAN MARK GUG RTAGS GYAS at the beginning of a line.
0F3D TIBETAN MARK ANG KHANG GYAS Because it has a CL Closing Punctuation property, the browser will not leave 0F3D TIBETAN MARK ANG KHANG GYAS at the beginning of a line.
169C OGHAM REVERSED FEATHER MARK Because it has a CL Closing Punctuation property, the browser will not leave 169C OGHAM REVERSED FEATHER MARK at the beginning of a line.
2046 RIGHT SQUARE BRACKET WITH QUILL Because it has a CL Closing Punctuation property, the browser will not leave 2046 RIGHT SQUARE BRACKET WITH QUILL at the beginning of a line.
207E SUPERSCRIPT RIGHT PARENTHESIS Because it has a CL Closing Punctuation property, the browser will not leave 207E SUPERSCRIPT RIGHT PARENTHESIS at the beginning of a line.
208E SUBSCRIPT RIGHT PARENTHESIS Because it has a CL Closing Punctuation property, the browser will not leave 208E SUBSCRIPT RIGHT PARENTHESIS at the beginning of a line.
232A RIGHT-POINTING ANGLE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 232A RIGHT-POINTING ANGLE BRACKET at the beginning of a line.
23B5 BOTTOM SQUARE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 23B5 BOTTOM SQUARE BRACKET at the beginning of a line.
2769 MEDIUM RIGHT PARENTHESIS ORNAMENT Because it has a CL Closing Punctuation property, the browser will not leave 2769 MEDIUM RIGHT PARENTHESIS ORNAMENT at the beginning of a line.
276B MEDIUM FLATTENED RIGHT PARENTHESIS ORNAMENT Because it has a CL Closing Punctuation property, the browser will not leave 276B MEDIUM FLATTENED RIGHT PARENTHESIS ORNAMENT at the beginning of a line.
276D MEDIUM RIGHT-POINTING ANGLE BRACKET ORNAMENT Because it has a CL Closing Punctuation property, the browser will not leave 276D MEDIUM RIGHT-POINTING ANGLE BRACKET ORNAMENT at the beginning of a line.
276F HEAVY RIGHT-POINTING ANGLE QUOTATION MARK ORNAMENT Because it has a CL Closing Punctuation property, the browser will not leave 276F HEAVY RIGHT-POINTING ANGLE QUOTATION MARK ORNAMENT at the beginning of a line.
2771 HEAVY RIGHT-POINTING ANGLE BRACKET ORNAMENT Because it has a CL Closing Punctuation property, the browser will not leave 2771 HEAVY RIGHT-POINTING ANGLE BRACKET ORNAMENT at the beginning of a line.
2773 LIGHT RIGHT TORTOISE SHELL BRACKET ORNAMENT Because it has a CL Closing Punctuation property, the browser will not leave 2773 LIGHT RIGHT TORTOISE SHELL BRACKET ORNAMENT at the beginning of a line.
2775 MEDIUM RIGHT CURLY BRACKET ORNAMENT Because it has a CL Closing Punctuation property, the browser will not leave 2775 MEDIUM RIGHT CURLY BRACKET ORNAMENT at the beginning of a line.
27E7 MATHEMATICAL RIGHT WHITE SQUARE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 27E7 MATHEMATICAL RIGHT WHITE SQUARE BRACKET at the beginning of a line.
27E9 MATHEMATICAL RIGHT ANGLE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 27E9 MATHEMATICAL RIGHT ANGLE BRACKET at the beginning of a line.
27EB MATHEMATICAL RIGHT DOUBLE ANGLE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 27EB MATHEMATICAL RIGHT DOUBLE ANGLE BRACKET at the beginning of a line.
2984 RIGHT WHITE CURLY BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 2984 RIGHT WHITE CURLY BRACKET at the beginning of a line.
2986 RIGHT WHITE PARENTHESIS Because it has a CL Closing Punctuation property, the browser will not leave 2986 RIGHT WHITE PARENTHESIS at the beginning of a line.
2988 Z NOTATION RIGHT IMAGE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 2988 Z NOTATION RIGHT IMAGE BRACKET at the beginning of a line.
298A Z NOTATION RIGHT BINDING BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 298A Z NOTATION RIGHT BINDING BRACKET at the beginning of a line.
298C RIGHT SQUARE BRACKET WITH UNDERBAR Because it has a CL Closing Punctuation property, the browser will not leave 298C RIGHT SQUARE BRACKET WITH UNDERBAR at the beginning of a line.
298E RIGHT SQUARE BRACKET WITH TICK IN BOTTOM CORNER Because it has a CL Closing Punctuation property, the browser will not leave 298E RIGHT SQUARE BRACKET WITH TICK IN BOTTOM CORNER at the beginning of a line.
2990 RIGHT SQUARE BRACKET WITH TICK IN TOP CORNER Because it has a CL Closing Punctuation property, the browser will not leave 2990 RIGHT SQUARE BRACKET WITH TICK IN TOP CORNER at the beginning of a line.
2992 RIGHT ANGLE BRACKET WITH DOT Because it has a CL Closing Punctuation property, the browser will not leave 2992 RIGHT ANGLE BRACKET WITH DOT at the beginning of a line.
2994 RIGHT ARC GREATER-THAN BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 2994 RIGHT ARC GREATER-THAN BRACKET at the beginning of a line.
2996 DOUBLE RIGHT ARC LESS-THAN BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 2996 DOUBLE RIGHT ARC LESS-THAN BRACKET at the beginning of a line.
2998 RIGHT BLACK TORTOISE SHELL BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 2998 RIGHT BLACK TORTOISE SHELL BRACKET at the beginning of a line.
29D9 RIGHT WIGGLY FENCE Because it has a CL Closing Punctuation property, the browser will not leave 29D9 RIGHT WIGGLY FENCE at the beginning of a line.
29DB RIGHT DOUBLE WIGGLY FENCE Because it has a CL Closing Punctuation property, the browser will not leave 29DB RIGHT DOUBLE WIGGLY FENCE at the beginning of a line.
29FD RIGHT-POINTING CURVED ANGLE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 29FD RIGHT-POINTING CURVED ANGLE BRACKET at the beginning of a line.
3009 RIGHT ANGLE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 3009 RIGHT ANGLE BRACKET at the beginning of a line.
300B RIGHT DOUBLE ANGLE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 300B RIGHT DOUBLE ANGLE BRACKET at the beginning of a line.
300D RIGHT CORNER BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 300D RIGHT CORNER BRACKET at the beginning of a line.
300F RIGHT WHITE CORNER BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 300F RIGHT WHITE CORNER BRACKET at the beginning of a line.
3011 RIGHT BLACK LENTICULAR BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 3011 RIGHT BLACK LENTICULAR BRACKET at the beginning of a line.
3015 RIGHT TORTOISE SHELL BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 3015 RIGHT TORTOISE SHELL BRACKET at the beginning of a line.
3017 RIGHT WHITE LENTICULAR BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 3017 RIGHT WHITE LENTICULAR BRACKET at the beginning of a line.
3019 RIGHT WHITE TORTOISE SHELL BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 3019 RIGHT WHITE TORTOISE SHELL BRACKET at the beginning of a line.
301B RIGHT WHITE SQUARE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave 301B RIGHT WHITE SQUARE BRACKET at the beginning of a line.
301E DOUBLE PRIME QUOTATION MARK Because it has a CL Closing Punctuation property, the browser will not leave 301E DOUBLE PRIME QUOTATION MARK at the beginning of a line.
301F LOW DOUBLE PRIME QUOTATION MARK Because it has a CL Closing Punctuation property, the browser will not leave 301F LOW DOUBLE PRIME QUOTATION MARK at the beginning of a line.
FD3F ORNATE RIGHT PARENTHESIS Because it has a CL Closing Punctuation property, the browser will not leave FD3F ORNATE RIGHT PARENTHESIS at the beginning of a line.
FE36 PRESENTATION FORM FOR VERTICAL RIGHT PARENTHESIS Because it has a CL Closing Punctuation property, the browser will not leave FE36 PRESENTATION FORM FOR VERTICAL RIGHT PARENTHESIS at the beginning of a line.
FE38 PRESENTATION FORM FOR VERTICAL RIGHT CURLY BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FE38 PRESENTATION FORM FOR VERTICAL RIGHT CURLY BRACKET at the beginning of a line.
FE3A PRESENTATION FORM FOR VERTICAL RIGHT TORTOISE SHELL BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FE3A PRESENTATION FORM FOR VERTICAL RIGHT TORTOISE SHELL BRACKET at the beginning of a line.
FE3C PRESENTATION FORM FOR VERTICAL RIGHT BLACK LENTICULAR BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FE3C PRESENTATION FORM FOR VERTICAL RIGHT BLACK LENTICULAR BRACKET at the beginning of a line.
FE3E PRESENTATION FORM FOR VERTICAL RIGHT DOUBLE ANGLE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FE3E PRESENTATION FORM FOR VERTICAL RIGHT DOUBLE ANGLE BRACKET at the beginning of a line.
FE40 PRESENTATION FORM FOR VERTICAL RIGHT ANGLE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FE40 PRESENTATION FORM FOR VERTICAL RIGHT ANGLE BRACKET at the beginning of a line.
FE42 PRESENTATION FORM FOR VERTICAL RIGHT CORNER BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FE42 PRESENTATION FORM FOR VERTICAL RIGHT CORNER BRACKET at the beginning of a line.
FE44 PRESENTATION FORM FOR VERTICAL RIGHT WHITE CORNER BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FE44 PRESENTATION FORM FOR VERTICAL RIGHT WHITE CORNER BRACKET at the beginning of a line.
FE48 PRESENTATION FORM FOR VERTICAL RIGHT SQUARE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FE48 PRESENTATION FORM FOR VERTICAL RIGHT SQUARE BRACKET at the beginning of a line.
FE5A SMALL RIGHT PARENTHESIS Because it has a CL Closing Punctuation property, the browser will not leave FE5A SMALL RIGHT PARENTHESIS at the beginning of a line.
FE5C SMALL RIGHT CURLY BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FE5C SMALL RIGHT CURLY BRACKET at the beginning of a line.
FE5E SMALL RIGHT TORTOISE SHELL BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FE5E SMALL RIGHT TORTOISE SHELL BRACKET at the beginning of a line.
FF09 FULLWIDTH RIGHT PARENTHESIS Because it has a CL Closing Punctuation property, the browser will not leave FF09 FULLWIDTH RIGHT PARENTHESIS at the beginning of a line.
FF3D FULLWIDTH RIGHT SQUARE BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FF3D FULLWIDTH RIGHT SQUARE BRACKET at the beginning of a line.
FF5D FULLWIDTH RIGHT CURLY BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FF5D FULLWIDTH RIGHT CURLY BRACKET at the beginning of a line.
FF60 FULLWIDTH RIGHT WHITE PARENTHESIS Because it has a CL Closing Punctuation property, the browser will not leave FF60 FULLWIDTH RIGHT WHITE PARENTHESIS at the beginning of a line.
FF63 HALFWIDTH RIGHT CORNER BRACKET Because it has a CL Closing Punctuation property, the browser will not leave FF63 HALFWIDTH RIGHT CORNER BRACKET at the beginning of a line.

NS: Non-starters

Snapshot summary, 2014-02-18
Firefox 27.0, Chrome 32.0.1700.107, Safari 6.1.1, Internet Explorer 9, Opera 19.0

The 27 non-starter characters in this list were all supported by Chrome, Opera and Safari, but several characters (including all the Khmer and Thai ones) were not supported as expected by Firefox and Internet Explorer.

Test link Assertion Details
0E5A THAI CHARACTER ANGKHANKHU Because it has an NS Non-Starter property, the browser will not leave 0E5A THAI CHARACTER ANGKHANKHU at the beginning of a line.
0E5B THAI CHARACTER KHOMUT Because it has an NS Non-Starter property, the browser will not leave 0E5B THAI CHARACTER KHOMUT at the beginning of a line.
17D4 KHMER SIGN KHAN Because it has an NS Non-Starter property, the browser will not leave 17D4 KHMER SIGN KHAN at the beginning of a line.
17D6 KHMER SIGN CAMNUC PII KUUH Because it has an NS Non-Starter property, the browser will not leave 17D6 KHMER SIGN CAMNUC PII KUUH at the beginning of a line.
17DA KHMER SIGN KOOMUUT Because it has an NS Non-Starter property, the browser will not leave 17DA KHMER SIGN KOOMUUT at the beginning of a line.
203C DOUBLE EXCLAMATION MARK Because it has an NS Non-Starter property, the browser will not leave 203C DOUBLE EXCLAMATION MARK at the beginning of a line.
3005 IDEOGRAPHIC ITERATION MARK Because it has an NS Non-Starter property, the browser will not leave 3005 IDEOGRAPHIC ITERATION MARK at the beginning of a line.
301C WAVE DASH Because it has an NS Non-Starter property, the browser will not leave 301C WAVE DASH at the beginning of a line.
303C MASU MARK Because it has an NS Non-Starter property, the browser will not leave 303C MASU MARK at the beginning of a line.
303B VERTICAL IDEOGRAPHIC ITERATION MARK Because it has an NS Non-Starter property, the browser will not leave 303B VERTICAL IDEOGRAPHIC ITERATION MARK at the beginning of a line.
309B KATAKANA-HIRAGANA VOICED SOUND MARK Because it has an NS Non-Starter property, the browser will not leave 309B KATAKANA-HIRAGANA VOICED SOUND MARK at the beginning of a line.
309C KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK Because it has an NS Non-Starter property, the browser will not leave 309C KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK at the beginning of a line.
309D HIRAGANA ITERATION MARK Because it has an NS Non-Starter property, the browser will not leave 309D HIRAGANA ITERATION MARK at the beginning of a line.
309E HIRAGANA VOICED ITERATION MARK Because it has an NS Non-Starter property, the browser will not leave 309E HIRAGANA VOICED ITERATION MARK at the beginning of a line.
30A0 KATAKANA-HIRAGANA DOUBLE HYPHEN Because it has an NS Non-Starter property, the browser will not leave 30A0 KATAKANA-HIRAGANA DOUBLE HYPHEN at the beginning of a line.
30FB KATAKANA MIDDLE DOT Because it has an NS Non-Starter property, the browser will not leave 30FB KATAKANA MIDDLE DOT at the beginning of a line.
30FC KATAKANA-HIRAGANA PROLONGED SOUND MARK Because it has an NS Non-Starter property, the browser will not leave 30FC KATAKANA-HIRAGANA PROLONGED SOUND MARK at the beginning of a line.
30FD KATAKANA ITERATION MARK Because it has an NS Non-Starter property, the browser will not leave 30FD KATAKANA ITERATION MARK at the beginning of a line.
30FE KATAKANA VOICED ITERATION MARK Because it has an NS Non-Starter property, the browser will not leave 30FE KATAKANA VOICED ITERATION MARK at the beginning of a line.
FE54 SMALL SEMICOLON Because it has an NS Non-Starter property, the browser will not leave FE54 SMALL SEMICOLON at the beginning of a line.
FE55 SMALL COLON Because it has an NS Non-Starter property, the browser will not leave FE55 SMALL COLON at the beginning of a line.
FF1A FULLWIDTH COLON Because it has an NS Non-Starter property, the browser will not leave FF1A FULLWIDTH COLON at the beginning of a line.
FF1B FULLWIDTH SEMICOLON Because it has an NS Non-Starter property, the browser will not leave FF1B FULLWIDTH SEMICOLON at the beginning of a line.
FF65 HALFWIDTH KATAKANA MIDDLE DOT Because it has an NS Non-Starter property, the browser will not leave FF65 HALFWIDTH KATAKANA MIDDLE DOT at the beginning of a line.
FF70 HALFWIDTH KATAKANA-HIRAGANA PROLONGED SOUND MARK Because it has an NS Non-Starter property, the browser will not leave FF70 HALFWIDTH KATAKANA-HIRAGANA PROLONGED SOUND MARK at the beginning of a line.
FF9E HALFWIDTH KATAKANA VOICED SOUND MARK Because it has an NS Non-Starter property, the browser will not leave FF9E HALFWIDTH KATAKANA VOICED SOUND MARK at the beginning of a line.
FF9F HALFWIDTH KATAKANA SEMI-VOICED SOUND MARK Because it has an NS Non-Starter property, the browser will not leave FF9F HALFWIDTH KATAKANA SEMI-VOICED SOUND MARK at the beginning of a line.

NS: Non-starters, small kana

Snapshot summary, 2014-02-18
Firefox 27.0, Chrome 32.0.1700.107, Safari 6.1.1, Internet Explorer 9, Opera 19.0

By default, Internet Explorer and Chrome did allow all 20 small kana characters to appear at the start of a line.

Firefox, Opera and Safari prevented the small kana characters appearing at the start of a line by pulling down the previous character with them.

Test link Assertion Details
3041 HIRAGANA LETTER SMALL A The browser will not allow the small kana character 3041 HIRAGANA LETTER SMALL A (which has the NS Non-Starter property) at the beginning of a line.
3043 HIRAGANA LETTER SMALL I The browser will not allow the small kana character 3043 HIRAGANA LETTER SMALL I (which has the NS Non-Starter property) at the beginning of a line.
3045 HIRAGANA LETTER SMALL U The browser will not allow the small kana character 3045 HIRAGANA LETTER SMALL U (which has the NS Non-Starter property) at the beginning of a line.
3047 HIRAGANA LETTER SMALL E The browser will not allow the small kana character 3047 HIRAGANA LETTER SMALL E (which has the NS Non-Starter property) at the beginning of a line.
3049 HIRAGANA LETTER SMALL O The browser will not allow the small kana character 3049 HIRAGANA LETTER SMALL O (which has the NS Non-Starter property) at the beginning of a line.
3063 HIRAGANA LETTER SMALL TU The browser will not allow the small kana character 3063 HIRAGANA LETTER SMALL TU (which has the NS Non-Starter property) at the beginning of a line.
3083 HIRAGANA LETTER SMALL YA The browser will not allow the small kana character 3083 HIRAGANA LETTER SMALL YA (which has the NS Non-Starter property) at the beginning of a line.
3085 HIRAGANA LETTER SMALL YU The browser will not allow the small kana character 3085 HIRAGANA LETTER SMALL YU (which has the NS Non-Starter property) at the beginning of a line.
3087 HIRAGANA LETTER SMALL YO The browser will not allow the small kana character 3087 HIRAGANA LETTER SMALL YO (which has the NS Non-Starter property) at the beginning of a line.
308E HIRAGANA LETTER SMALL WA The browser will not allow the small kana character 308E HIRAGANA LETTER SMALL WA (which has the NS Non-Starter property) at the beginning of a line.
30A1 KATAKANA LETTER SMALL A The browser will not allow the small kana character 30A1 KATAKANA LETTER SMALL A (which has the NS Non-Starter property) at the beginning of a line.
30A3 KATAKANA LETTER SMALL I The browser will not allow the small kana character 30A3 KATAKANA LETTER SMALL I (which has the NS Non-Starter property) at the beginning of a line.
30A5 KATAKANA LETTER SMALL U The browser will not allow the small kana character 30A5 KATAKANA LETTER SMALL U (which has the NS Non-Starter property) at the beginning of a line.
30A7 KATAKANA LETTER SMALL E The browser will not allow the small kana character 30A7 KATAKANA LETTER SMALL E (which has the NS Non-Starter property) at the beginning of a line.
30A9 KATAKANA LETTER SMALL O The browser will not allow the small kana character 30A9 KATAKANA LETTER SMALL O (which has the NS Non-Starter property) at the beginning of a line.
30C3 KATAKANA LETTER SMALL TU The browser will not allow the small kana character 30C3 KATAKANA LETTER SMALL TU (which has the NS Non-Starter property) at the beginning of a line.
30E3 KATAKANA LETTER SMALL YA The browser will not allow the small kana character 30E3 KATAKANA LETTER SMALL YA (which has the NS Non-Starter property) at the beginning of a line.
30E5 KATAKANA LETTER SMALL YU The browser will not allow the small kana character 30E5 KATAKANA LETTER SMALL YU (which has the NS Non-Starter property) at the beginning of a line.
30E7 KATAKANA LETTER SMALL YO The browser will not allow the small kana character 30E7 KATAKANA LETTER SMALL YO (which has the NS Non-Starter property) at the beginning of a line.
30EE KATAKANA LETTER SMALL WA The browser will not allow the small kana character 30EE KATAKANA LETTER SMALL WA (which has the NS Non-Starter property) at the beginning of a line.