For users of #Sidebery on #firefox I have found a bug report with some good isntructions for how to get rid of the awful bar beside Sidebery that's come from a recent update to Firefox.
It does make Firefox look nicer by removing the two sets of tabs (one horizontal and one vertical) and now there's just vertical tabs (via sidebery, instead of natively).
Like a mindless moth to a flame, this morn i was tempted to give #ZenBrowser yet another chance, despite its disappointing history of letting me down, eg:
Sadly, yet again after only ~two hours, i had to abandon it again, when i discovered that the bug with the search-bar dropdown menu remains broken, such that choosing impromptu searches in my alternative search engines remains impossible.
So, back i go, yet again, to the lovely... and reliable... 
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management + Web Panel UX i've ever had, easily eclipsing Vivaldi, 
#Floorp, 
#ZenBrowser, Waterfox, LibreWolf... ergo = 
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
@markstos Heehee.
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management + Web Panel UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
@ComputerBase For anyone who's never heard of / used #TreeStyleTab or #Sidebery, 
newish #TabGroups [atm they work better in Nightly than Release] probably seem fine. For we TST & especially Sidebery users though, they are absolutely not good enough, but hopefully will get more & more features & functions soon.
@zenbrowser By #TabFolders i presume you mean just the non-hierarchical flat arrangement per Firefox, Vivaldi, Chromium, but with your adaptations so they respect your Workspaces?
What about proper nestable trees, like in #TreeStyleTab & #Sidebery? Several months ago, in the reddit sub, you promised that you intended to have native tree tabs, not just folders. Several of us in your GitHub Issues have asked you about this, for months, but you have ignored the discussions there, never replying.
Pls can you let us know, one way or the other?
@cynical13 @zenbrowser After being an early fan, i more or less abandoned #ZenBrowser several months ago, for its terrible unreliability, & various feature developments either of no interest to me, or which i actively disliked. Last week i decided to give it another chance... but in less than 24 hours it broke itself again [my various UI customisations reset to default], & lost all my tabs again.
Consequently:
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management + Web Panel UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
@mauro Otoh i am officially #FUD-free.
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management + Web Panel UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
@itsfoss #ImageMagick screencap: #Firefox with #Sidebery for #VerticalTabs, #IceWM with #ShadesOfGrey on #Arch #GNU+#Linux
#Apps at sight: #Geany #Zathura #Viewnior #DeltaChat #Dino #Jami #LXTerminal #PCManFM #fs
https://imagemagick.org/
https://addons.mozilla.org/en-US/firefox/addon/sidebery/
https://ice-wm.org
https://archlinux.org/
https://www.gnu.org/
https://www.geany.org/
https://pwmt.org/projects/zathura/
https://siyanpanayotov.com/project/viewnior/
https://delta.chat/en/
https://dino.im/
https://jami.net/
https://www.lxde.org/
@mconley Yes, & also nice is the new middle-click to save & close tab-group.
What's still not nice is:
Hence i still need to retain #Sidebery.
@fnwbr And yet, here i be, revelling in the delightful UX that is my , with all the #telemetry disabled, the #AI disabled, numerous other parameters hardened via my #userJS, with the exquisite #Sidebery & its infinitely-nestable tree-tabs & multiple #Workspaces on its LHS, & the brilliant project #FirefoxSecondSidebar with my 21 #WebPanels on its RHS. It's such a great daily browsing UX, unfazed by the last ten days of global #FUD [all the so-called nasties can be disabled, either via simple clicks in the Settings UI, or otherwise via about:config / user.js]. Herd-mentality is a ridiculous trait of humans.
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management + Web Panel UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
@MsDropbear42 Oh ffs, this latest experiment with #ZenBrowser has ended after only a few hours, due to yet another catastrophic failure, preceded by various annoyances:
Search Bar refused to show the drop-down menu of alternative search engines [works fine in and ] and ]Search Bar was gone again, the native tabs bar refused to Collapse again], but worst of all, all my open tabs were gone... again 
My dear old might be less pretty, less visually exciting, & might not have native split tabs, but far out it is & remains way way waaaaaaaaaaaaaaaaaaaaay more reliable than Zen. I mean, it's really a bit silly... is Alpha, is Beta, yet the former is generally rock solid reliable in the ~decade i've been using it. Otoh, all my experiments with Zen, over the past ~12-18 months, have ended in disappointment, frustration, & often also destruction.
So, yet again, i return to...
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management + Web Panel UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
Have decided to give #ZenBrowser another go, but with conditions:
In case anyone wonders, this [temporary?] change from my hitherto daily [#FirefoxNightly + #Sidebery + #uBlockOrigin + #FirefoxSecondSidebar] has nothing to do with the recent global #FUD wrt Mozilla's #TOU / #EULA, but instead is due to the aesthetic pleasantness of & the desire to use its #SplitTabView #TabSplitView #TabPaneView; two undeniable advantages over Nightly.
* the Zen subreddit is full of users posting that Zen spontaneously lost all their tabs, or all their pinned tabs, or all their unpinned tabs. In my own past months of using Zen with its native #Workspaces & tabs, it also happened to me, twice, & it is most exasperating.
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management + Web Panel UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
@eknobl Also, the native #TabGroups have been working well for several weeks in , & in my recent testing they also now seem to have become reliable in . The whole native #VerticalTabs UI ootb has ridiculous amounts of padding per tab, such that a stupidly small number of tabs can be open before invoking the scrollbar... i fixed this via some #CSS. The one remaining major design paradigm i dislike is that the tab groups are primitive like in Vivaldi & Chromium, ie, only single-level; no hierarchical trees are possible. Hence, even though the new VTs & TGs are aesthetically pleasing & quite usable, i still keep returning to Sidebery.
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
This might be interesting. My just updated from Nightly 138.0a1 (20250306092841); Installed on: 7 March 2025 at 08:53:02 to Nightly 138.0a1 (20250306213030); Installed on: 7 March 2025 at 12:53:01. Looking thru its Settings for any obvious changes, i found this new section:
Contrast Control
Websites have a variety of foreground and background colors. Configure Nightly to use the same colors across websites for improved readability.
Automatic (use system settings)
Off
Custom
I might play around with the AO #DarkReader disabled, & trying different parameters here.
#FirefoxNightly + #Sidebery + #uBlockOrigin + #FirefoxSecondSidebar = #FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar =
@thelinuxEXP Hi Nick. Oh well, fwiw, i continue to trust my , but i reinforce that sense of equanimity with my long-standing disabling of all the telemetry, both via the UI Preferences check-boxes, & my discrete additions to my user.js. I do not defend Mozilla's unbelievably hamfisted binfire they created last week & subsequently, but i do til further notice accept their explanation [&, as i said, i have forced all telemetry off anyway].
11 [which i think you installed] is nearing end-of-life [but i happily ran it for over a year til a few months ago], & #Floorp 12 via recently released Beta is improving each few days but so far remains very broken & feature-incomplete.
was a very interesting option i ran for several months, but have largely lost interest in it nowadays as its development has headed off in areas of little interest to me, whilst neglecting features of importance to me.
#Tor #LibreWolf #Waterfox all fail to meet my daily usability preferences.
So til further notice, i remain happily in this mode, fwiw:
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
Best wishes with your alternative choices, hope it all goes well for you.
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =
#IMHO, best #Firefox implementation of #VerticalTabs, with #Sidebery.
https://addons.mozilla.org/en-US/firefox/addon/sidebery/
https://github.com/mbnuqw/sidebery
https://github.com/mbnuqw
@mozillaofficial @firefoxnightly @FirefoxDevTools @firefox #addons #freesoftware #libresoftware #mpl #mit #browser #tabs #design #apps
@dpecos @Vivaldi Coz my actions & decisions are predicated on facts, not #FUD, until actual adverse facts emerge [wildly speculative bush-lawyering are not "facts"], ufn i remain happily...
#FirefoxNightly + #Mv2 #uBO + #Sidebery + #FirefoxSecondSidebar = THE best browsing & sophisticated tab management UX i've ever had, easily eclipsing Vivaldi, #Floorp, #ZenBrowser, Waterfox, LibreWolf... ergo =
#FirefoxNightly + #NativeVerticalTabs + #uBlockOrigin + #FirefoxSecondSidebar = Very usable already as of Feb 2025, albeit less powerful than Sidebery, ergo =