今天刚释出的新版30.0，对一般使用者来说，更动不多。
[New]
1. Sidebars button in browser chrome enables faster access to social,
bookmark, & history sidebars
2. Mac OS X command-E sets find term to selected text
3. Support for GStreamer 1.0
[Changed]
1. Disallow calling WebIDL constructors as functions on the web
[Developer]
1. With the exception of those bundled inside an extension or ones that are
whitelisted, plugins will no longer be activated by default (see blog post)
2. Fixes to box-shadow and other visual overflow (see bug 480888)
3. Mute and volume available per window when using WebAudio
4. background-blend-mode enabled by default
5. Use of line-height allowed for <input type="reset|button|submit">
6. ES6 array and generator comprehensions implemented (read docs for more
details)
7. Error stack now contains column number
8. Support for alpha option in canvas context options (feature description)
[Fixed]
1. Ignore autocomplete="off" when offering to save passwords via the
password manager (see 956906)
2. TypedArrays don't support new named properties (see 695438)
[Known Issues]
1. Errors loading scripts inside eval scripts with Developer Tools open
(998908)
Resolved in v31.0beta
2. Mac OS X: cmd-L no longer opens a new window when no window is available
(1008793)
Resolved in v32.0a2
3. Without affecting security, after restoring your session, Extended
Validation Certificates might not display (See 995801)
Resolved in v31.0a2
4. Slow shut downs lead to 'Firefox is already running' warning (see 966469
and 985655)