[Pkg-mozext-maintainers] Bug#959865: webext-treestyletab: no longer works with Firefox 76

[Ansgar]

Package: webext-treestyletab
Version: 3.4.7-1
Severity: important

I updated to Firefox 76.0-1 this morning and webext-treestyletab no
longer works.  The toolbar button is still shown, but pushing it (or
the "F1" key) no longer opens the tab sidebar.

A different computer has 3.5.3 from addons.mozilla.org installed.
That version works fine, so maybe only an update to the current
upstream release is needed.

Ansgar