Regarding TabCarousel, a Chrome extension I created:

This extension may stop working on or after June 1st, 2024 due to a change in policy that will disallow Manifest v2 in favor of v3. This is more than a simple technical change. If you are curious to know more, please search out more information.

As a result, I am personally switching to Firefox. I also don’t use TabCarousel very often anymore. I built a Firefox-compatible alpha in 2017 as a proof-of-concept. Pull requests for improvements are welcome.

I would also accept pull requests to implement Manifest v3 for Chrome, but it’s not something that I have the time, energy, or desire to implement myself. That said, if any users are interested in helping fund this work, please reach out.

Source: Manifest V3 and June 2024 deadline - Issue #49 - benjaminoakes/TabCarousel