firefox vs chrome 新版本发布竞赛

firefox----------------------------
Firefox 13 13.0
13.0a1 Firefox 13.0 Nightly February 1, 2012 First Firefox 13.0 Nightly build.
13.0a2 Firefox 13.0 Aurora March 19, 2012 First Firefox 13.0 Aurora build.
13.0b1 Firefox 13.0 Beta 1 April 27, 2012 First Firefox 13.0 Beta release.
13.0b2 Firefox 13.0 Beta 2 May 3, 2012 Second Firefox 13.0 Beta release.
13.0b3 Firefox 13.0 Beta 3 May 15, 2012 Third Firefox 13.0 Beta release.
13.0b4 Firefox 13.0 Beta 4 May 17, 2012 Fourth Firefox 13.0 Beta release.
13.0b5 Firefox 13.0 Beta 5 May 25, 2012 Fifth Firefox 13.0 Beta release.
13.0b6 Firefox 13.0 Beta 6 May 30, 2012 Sixth Firefox 13.0 Beta release.
13.0b7 Firefox 13.0 Beta 7 June 1, 2012 Seventh Firefox 13.0 Beta release.
13.0 Firefox 13.0 June 5, 2012 Official Firefox 13.0 release.

Firefox 14 14.0
14.0a1 Firefox 14.0 Nightly March 14, 2012 First Firefox 14.0 Nightly build.
14.0a2 Firefox 14.0 Aurora April 27, 2012 First Firefox 14.0 Aurora build.
14.0b1 Firefox 14.0 Beta 1 June 5, 2012 First Firefox 14.0 Beta release.
14.0 Firefox 14.0 July 17, 2012 Official Firefox 14.0 release.

Firefox 15 15.0
15.0a1 Firefox 15.0 Nightly April 25, 2012 First Firefox 15.0 Nightly build.
15.0a2 Firefox 15.0 Aurora June 5, 2012 First Firefox 15.0 Aurora build.
15.0b1 Firefox 15.0 Beta 1 July 17, 2012 First Firefox 15.0 Beta release.
15.0 Firefox 15.0 August 28, 2012 Official Firefox 15.0 release.

Firefox 16 16.0
16.0a1 Firefox 16.0 Nightly June 5, 2012 First Firefox 16.0 Nightly build.
16.0a2 Firefox 16.0 Aurora July 17, 2012 First Firefox 16.0 Aurora build.
16.0b1 Firefox 16.0 Beta 1 August 28, 2012 First Firefox 16.0 Beta release.
16.0 Firefox 16.0 October 9, 2012 Official Firefox 16.0 release.

Firefox 17 17.0
17.0a1 Firefox 17.0 Nightly July 17, 2012 First Firefox 17.0 Nightly build.
17.0a2 Firefox 17.0 Aurora August 28, 2012 First Firefox 17.0 Aurora build.
17.0b1 Firefox 17.0 Beta 1 October 9, 2012 First Firefox 17.0 Beta release.
17.0 Firefox 17.0 November 20, 2012 Official Firefox 17.0 release.

Firefox 18 18.0
18.0a1 Firefox 18.0 Nightly August 28, 2012 First Firefox 18.0 Nightly build.
18.0a2 Firefox 18.0 Aurora October 9, 2012 First Firefox 18.0 Aurora build.
18.0b1 Firefox 18.0 Beta 1 November 20, 2012 First Firefox 18.0 Beta release.
18.0 Firefox 18.0 January 1, 2013 Official Firefox 18.0 release.

Firefox 19 19.0
19.0a1 Firefox 19.0 Nightly October 9, 2012 First Firefox 19.0 Nightly build.
19.0a2 Firefox 19.0 Aurora November 20, 2012 First Firefox 19.0 Aurora build.
19.0b1 Firefox 19.0 Beta 1 January 1, 2013 First Firefox 19.0 Beta release.
19.0 Firefox 19.0 February 12, 2013 Official Firefox 19.0 release.


chrome------------------------------------------------------------

19.0.1084_ 2012-05-15_ 536.5_ 3.9.24.7

Access tabs between devices.[73]
Reorganized and searchable settings interface.
Added better spell check by using the Google search engine spell checker.
Added Web Store link to the bottom of New Tab Page.
Experimental JavaScript Harmony (ECMAScript 6) support.[74]
Experimental Web Intents API.[75]

20.0.1132_ 2012-05-22_ 536.10_ 3.10.6.0

Enable the Chrome To Mobile page action for users with compatible registered devices.[citation needed]
Panorama View. Tabs have a minimum width and begin to stack at the sides. The tabs (excluding the current tab) closest to the current tab are on top.[citation needed]
Experimental touch friendly UI adjustments. Context menus have extra vertical padding between items.[76]
Experimental PeerConnection APIs for WebRTC functionality.[citation needed]
Wider "new tab" button.[77]

21.0.1155_ 2012-05-29_ 537.1_ 3.11.6.2

Media Stream API (getUserMedia) enabled by default. (e.g. webcam access via Javascript)[78]
Gamepad API prototype available by default.
TLS 1.1 is enabled by default.[79]
Mouse Lock (Pointer Lock) no longer requires fullscreen.