Comparison of browser engines (typography support)

This article compares web typography support for several web browser engines.

Explanation of the tables

Engine Status Embedded in
Blink Active Google Chrome and Chromium, plus many other browsers including Opera and Vivaldi
EdgeHTML Active Microsoft Edge browser and Universal Windows Platform apps
Gecko Active Firefox browser and Thunderbird email client, plus forks like SeaMonkey and Waterfox
WebKit Active Safari browser, Adobe AIR apps, and other browsers like Maxthon
KHTML Discontinued Konqueror browser
Presto Discontinued formerly in the Opera browser
Trident Discontinued Internet Explorer browser and Microsoft Outlook email client

Values

These indicate the level of support for the given item in each engine. By default, the most recent version of the engine is implied. However, a specific version number can be listed; when this indicates full support, it's the initial version of the engine fully supporting the item.

Value Meaning
Yes Fully supported
No Has never been supported
Partial Only some values are supported
Incorrect Not implemented correctly in all cases
Experimental May be incomplete or buggy
Nightly build Currently in development; full support is expected
Depends Only supported for the specified conditions
Dropped No longer supported

Support for CSS font resources

CSS3 specified a mechanism for downloading and displaying fonts within a web page.[spec 1] This table compare support for that mechanism. Note that Embedded OpenType (EOT) font download does not bring in the entire OpenType font and therefore, the most prominent feature of Open Type, ligature support, does not come with EOT. Trident before version 5.0 supports only EOT. EOT is not sufficient for smartfonts that rely on ligatures.

Trident[m 1] Gecko[g 1] WebKit[w 1] Presto[p 1][p 2]
Grammar and rules
CSS3 @font-face <3.1[IE 4.0] 1.9.1 525[note 1] 2.2
Descriptors
CSS3 font-family <3.1[IE 4.0] 1.9.1 525 2.2
src Partial[note 2]
font-style <3.1[IE 4.0]
font-weight
font-stretch 5.0[m 3] 9.0[g 2] No[w 6] No
unicode-range Experimental[g 3] Partial[note 3]
font-variant No 24.0[g 4] No No
font-feature-settings 6.0[m 4] Experimental[g 5]

Support in HTML and XML documents

This table compares support for font formats applied with the @font-face rule in HTML and XML documents.

Format Trident/EdgeHTML Gecko WebKit Blink
EOT Embedded OpenType <3.1[m 5] No[g 6] No[w 8] No[b 1]
TTF TrueType 5.0[m 6] 1.9.1[g 7] 525.26[w 9] 537.36[w 9]
OTF OpenType
SVG Scalable Vector Graphics No[m 7] No[g 8] No[b 2]
WOFF Web Open Font Format 1.0 5.0[m 8] 1.9.2[g 9] 534.48.3[w 10] 537.36[w 10]
2.0 14.14316[m 9] 36[g 10] 602.1.50[w 11] 537.36[b 3]

Support in SVG documents

This table compares support for font formats applied with the @font-face rule in SVG documents.

Format Trident Gecko[g 11] WebKit Presto
Embedded OpenType (EOT) No No[g 6] No[w 8] No
TrueType (TTF) Yes Yes 2.2
OpenType (OTF) 18.0 No
Scalable Vector Graphics (SVG) No[g 8] 525
Web Open Font Format (WOFF) No No[w 10] 2.7.81

Smart font features support

Format Trident Gecko WebKit Presto
OpenType liga ligatures[spec 2] No 2.0 Partial[w 12] No
OpenType rlig ligatures[spec 3] No
ZWNJ and ZWJ (Unicode characters used for ligature control) Yes Yes No[p 3]

See also

Notes

  1. ↑ Prior to version 4.0, Google Chrome had font support disabled.[w 2][w 3][w 4][w 5]
  2. ↑ Doesn't understand the format() or local() identifiers.[m 2]
  3. ↑ Doesn't understand multiple, comma-separated ranges.[w 7]

References

Specifications
  1. ↑ CSS Fonts Module Level 3 - Font resources, W3C
  2. ↑ OpenType Layout tag registry, Tag: 'liga', Microsoft
  3. ↑ OpenType Layout tag registry, Tag: 'rlig', Microsoft
Trident/EdgeHTML
  1. ↑ About Font Embedding, Microsoft
  2. ↑ @font-face support in Internet Explorer, archived from the original on 2010-07-19
  3. ↑ Internet Explorer Platform Preview Guide for Developers, Microsoft
  4. ↑ "font-feature-settings property". Microsoft. Retrieved 8 November 2013.
  5. ↑ About Font Embedding (Internet Explorer), Microsoft
  6. ↑ Internet Explorer Platform Preview Guide for Developers, Microsoft
  7. ↑ Best Practices for Getting Started with SVG – IEBlog, Microsoft
  8. ↑ Galineau, Sylvain (2010-04-23), Meet WOFF, The Standard Web Font Format, Microsoft
  9. ↑ Olivier, Frank (2016-05-03), Speed up page load with WOFF 2.0 fonts in Microsoft Edge - Microsoft Edge Dev BlogMicrosoft Edge Dev Blog, Microsoft
Gecko
  1. ↑ @font-face, Mozilla
  2. ↑ Bug 3512 - (font-stretch) Implement font-stretch property, Mozilla
  3. ↑ Bug 475891 - implement unicode-range support in user font set, Mozilla
  4. ↑ Bug 549861 - (font-variant) implement parsing of font feature properties, Mozilla
  5. ↑ Bug 511339 - implement experimental support for -moz-font-feature-settings, Mozilla
  6. 1 2 Bug 520357 - support new web font format (EOT Lite) in @font-face, Mozilla
  7. ↑ 70132 - Support @font-face, Mozilla
  8. 1 2 Bug 119490 - Implement SVG fonts, Mozilla
  9. ↑ Mozilla Supports Web Open Font Format - The Mozilla Blog, Mozilla
  10. ↑ Firefox 35 for developers - Mozilla &#x007c MDN, Mozilla
  11. ↑ Bug 468237 - SVG image using a font specified via @font-face doesn't use the font after it loads, Mozilla
WebKit
  1. ↑ Hyatt, Dave (2007-10-03), Downloadable Fonts, Apple
  2. ↑ Issue 9633: Disable web fonts by default, Google, 2009-04-01
  3. ↑ Full pass of acid3 - Chromium-dev, Google, 2009-07-03
  4. ↑ Issue 17818: Enabled dynamic / web font support in a secure manner, Google, 2009-07-27
  5. ↑ Irish, Paul (2010-01-25), Chrome and @font-face: It's here!
  6. ↑ Bug 12530 - CSS3: Support the font-stretch property, WebKit
  7. ↑ @font-face support in Safari
  8. 1 2 Bug 20542 - Adding EOT Font Rendering capability, WebKit
  9. 1 2 Changeset 29012 – WebKit, WebKit
  10. 1 2 3 >31302 – Add WOFF support for @font-face, WebKit
  11. ↑ Safari 10.0, Apple
  12. ↑ On Safari, ligatures may be switched on with the CSS setting text-rendering, but then, they are used indiscriminately even when letter-spacing is increased (see Fraktur letterspacing); on Google Chrome, ligatures do not work.
Blink
Presto
  1. ↑ Mills, Chris (2008-12-04), Opera Presto 2.2 and Opera 10 — a first look, Opera
  2. ↑ Seven Web Fonts showcases, Opera, 2009-09-01
  3. ↑ When letter-spacing is increased, these characters are spacing.
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