At Mozilla, we work hard to make Firefox the best browser for you. That’s why we're always focused on building a browser that empowers you to choose your own path, that gives you the freedom to explore without worry or compromises. We’re excited to share more about the updates and improvements we ha...
The way tree style tabs worked after they broke it was never very good. Floorp is what to use if you wanted side tabs on Firefox.
That said I still went back to Vivaldi after trying to use Floorp because of stupid little ux issues like pinned tabs not being protected from closing, and broken session saving.
The TreeStyleTab extension for Firefox has added vertical tabs for a decade
The way tree style tabs worked after they broke it was never very good. Floorp is what to use if you wanted side tabs on Firefox.
That said I still went back to Vivaldi after trying to use Floorp because of stupid little ux issues like pinned tabs not being protected from closing, and broken session saving.