Firefox pretty sliding sidebar / pinned / active tab theme for Tree Style Tab

[theprojectsomething]

I made an opinionated TST stylesheet for Firefox that I've been actively using for around 18 months now. It works well, thought I would share (tho needs a couple of v. minor updates since the most recent updates).

==> Gist here <==

Features

• Auto-sliding draw for TST
• Leaves 'pinned' and 'active' tabs visible in standard browser chrome
• Leaves 'last-active' tabs visible for 3 minutes after becoming inactive
• Where an active tab is pinned, leaves 'last-active' tab (x1) visible for 1hr