A new version (0.15.20150902901) of TreeStyleTabs has been released that works with Firefox 42, but it will not automatically update so you need to install it f

A new version (0.15.20150902901) of TreeStyleTabs has been released that works with Firefox 42, but it will not automatically update so you need to install it from [1]. See also [2]. [1] https://addons.mozilla.org/en-US/firefox/addon/tree-style-tab/versions/?page=1#version-0.15.20150902901 https://addons.mozilla.org/en-US/firefox/addon/tree-style-ta... [2] https://github.com/piroor/treestyletab/issues/973 https://github.com/piroor/treestyletab/issues/973