Install on Firefox

Install 5.5.0 from Mozilla
Version 5.5.0 (latest stable release) - 673.7 kB - released on 4/4/2016
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Newest version (pending Mozilla review)

5.5.0a21 - 673.8 kB - released on 4/4/2016

Beta versions

5.5.0a21 - 673.8 kB - released on 4/4/2016

Old versions

5.4.2 - 623.2 kB - released on 10/16/2015
5.4.1 - 613.9 kB - released on 8/10/2015
5.3.1 - 576.3 kB - released on 5/25/2015
5.3.0 - 576.2 kB - released on 5/6/2015
5.2.0 - 548.3 kB - released on 4/19/2015
5.1.2 - 500.9 kB - released on 3/31/2015
5.0.1 - 410.6 kB - released on 3/11/2015

Deprecated versions

Those releases won't work on Firefox >= 36 and are no longer supported.

4.9.24 - 779.7 kB - released on 9/5/2014
4.9.23 - 779.5 kB - released on 8/8/2014
4.9.22 - 779.4 kB - released on 3/24/2014
4.9.21 - 778.0 kB - released on 8/13/2013
4.9.17 - 776.4 kB - released on 7/17/2013
4.9.15 - 774.6 kB - released on 5/28/2013
4.9.14 - 774.6 kB - released on 2/22/2013
4.9.13 - 774.4 kB - released on 1/8/2013
4.9.12 - 771.7 kB - released on 11/21/2012
4.9.11 - 771.3 kB - released on 10/31/2012
4.9.10 - 771.1 kB - released on 9/15/2012
4.9.9 - 764.9 kB - released on 3/29/2012
4.9.8 - 764.9 kB - released on 12/17/2011
4.9.7 - 683.0 kB - released on 11/10/2011
4.9.6 - 682.0 kB - released on 10/26/2011
4.9.5 - 681.0 kB - released on 8/12/2011
4.9.4 - 681.0 kB - released on 7/25/2011
4.9.3 - 672.8 kB - released on 6/19/2011
4.9.1 - 671.7 kB - released on 6/16/2011
4.9 - 670.7 kB - released on 6/12/2011
4.8.6 - 620.5 kB - released on 3/28/2011

Install on Chrome

Install 1.0.1.2 from Chrome Web Store
Version 1.0.1.2 (latest stable release) - 580KiB - released on 12/16/2015