Still happily using #Floorp12 Beta as my daily browser, but made an important change last night. As a longterm #TST, then later #Sidebery, user & lover, the last several months of me deliberately forcing myself to use my #FirefoxNightly then more recently Floorp12 Beta profiles predicated on the native FF #VerticalTabs & #TabGroups has been interesting, yet filled with frequent regret, so invested have i been for years in the power of managing all my tabs in a sophisticated tree hierarchy.
FF native tab groups atm remain merely single-level, like Chromium & Vivaldi, thus far less powerful than either TST or Sidebery. I know from bitter experience last year with Floorp10 & Floorp11 that Sidebery is incompatible [due to the Floorp #Workspaces; not only do Sidebery's tabs not recognise/respect Floorp's Workspaces, because both softwares seek to control tab location, they severely clash, causing major browser instability & often tab loss]. Hence i've made no attempt to court further/similar disasters by trying Sidebery in Floorp12. So, last night i created a new profile in Floorp12 for use with TST, & that's what i'm now using. Though in Nightly i regard Sidebery superior to TST, in Floorp the reverse is true; the Floorp Dev/s seem to have taken particular steps to ensure TST compatibility, which thus integrate really well with Floorp's native Workspaces.
The one decided drawback atm of using this new profile however is that with TST active & native tabs hidden, there is no instant access to the important tab context-menu items for splitting-tabs, & moving them to other Workspaces. Fortunately, both those operations i need to use only rarely, so my clunky workaround, which would be untenable if i needed to do it dozens of times each day, is bearable albeit still irritating. When the occasional need arises to do either of those operations, i temporarily unhide the native tabs at the UI top, perform the requisite right-click ops on the applicable tabs, then re-hide said native tabsbar.