It works for me, and it helps managing tabs while dealing with ADHD.

Must have add-on if you're using TreeStyleTabs (which is required). Dream came true.

Love it! Just what I needed! Would be great if it was colorizing automatically new or moved tab based on parent nevertheless even with manual colorization the tabs findability is improved dramatically. Simple yet useful. Thanks!

I've been looking for an addon to do this for a long time. It works as I want it to.

I realize that the instructions said it needs Tree Style Tabs, but I did not realize that that meant the custom tab colors would only show up in the Tree Style Tab list and not across the main tab bar itself. Perhaps this point could be clarified in the instructions?

Anyway, once I realized where the colors showed up, I was happy to have access to options I'd wanted to have for a long time. Well done to the developer, emvaized!

I like this add-on!
However, it doesn't seem to work properly after session restoration after restarting Firefox in multi-window.