This is a super lightweight Firefox extension for Tree Style Tab that overlays tab numbers on the corners of each tab, with two possible counting rules:
- Nested count. Hierarchical numbering that follows the tree structure
- Flat count. Simple sequential numbering across the window
Right now it includes some simple customization options for text location, font style, etc.
Works well with dynamically-colored themes like that offered by Adaptive Tab Bar Color!
Download the .xpi file from the lastest release.
Then, about:addons in Firefox address bar > Extensions > Gear icon > Install Add-on From File