I GOT SO MUCH MORE THAN I WAS LOOKING FOR with Tree Tabs by Kroppy.

When I first installed Tree Tabs, I just wanted vertical tabs. my favorite super-extension, TabMixPlus, had been obliterated by the Quantum change, but never did i care about trees, levels or groups. yeah, i saw these features touted on Tree Tabs, I DIDN'T CARE. i just knew I had tabs out my ears and couldn't deal with horror of horizontal tab display and navigation.

i tested out a bunch of vertical tab extensions but ultimately dug into Tree Tabs. Why?

THE COMPRESSED FORMAT OF PINNED TABS at the top of the Tree Tabs column. ingenious! once i saw it, I couldn't live without it.

the other bit of perfection was the compact height of the tabs. other extensions waste so much space with big tall tabs and huge fonts. this forces extra scrolling, but the real crime is allowing the user to view only 15 tabs at once! i also quickly embraced the ability to customize all the aesthetics, which only enhanced my joy at being reunited with functional tabs.

after 6 months of use, tabs quickly multiplying like rabbits on coke and viagra, i finally investigated Groups.

HEY, GROUPS ARE A GREAT IDEA! WHY DIDN'T I USE THEM BEFORE?!

while setting up my Groups, i also checked out Folders.

WHOA, GROUPS AND FOLDERS WORK *WONDERS* FOR ORGANIZATION WHEN YOU USE THEM TOGETHER!

what a sap i've been to ignore these useful features! with all this tab management brilliance in play, i hardly notice i have 300 tabs! think that's crazy? think of my tabs like an interactive task and research to-do list. much more productive than preposterous. i'm still not using trees (ironically), but i don't dare say "never!"

i recently trained myself to use the Tree Tab Settings and Re-open Tab buttons instead of right-clicks. also now taking advantage of unloading whole groups at once to save memory... been using these features for about a month and everything's now second nature.

today I re-discovered the Export Session button and contemplating putting it to work. Firefox restores my sessions, but a fail-safe would might be helpful.

guess you could say i've really come around on Tree Tabs, an incredible utility, and I'm super grateful to Kroppy for creating it. come New Year's, when I evaluate my extensions and contribute to my most beloved... Kroppy, you're a sure thing. you're building a productivity powerhouse. thank you for your vision and efforts. hope plenty appreciate your talents.

my only feature suggestions would be

1) some way to backup prefs and color formatting, though i'm assuming it's time consuming, else i would've already found it.

2) the ability to customize the tabs context menu. i could shave off 9 or 10 entries

3) k, just saw my third wish has been pre-granted LOL... F1 to toggle Tree Tabs sidebar. UH-MAZING.

the extension is already 5-stars. these are just first-world whines.

the only bug i've found is that sometimes when trying to drag and drop a tab, no tabs will move. it only happens once in a while, and i haven't yet noticed a pattern or precursor. what happens is, i'll grab a tab as usual, but instead of just dragging normally, where i clearly see both the insertion drop line that appears between other tabs, and the dual lines that designate a drop into a folder, those lines won't appear. the tabs i'm dragging _over_ do change color as the pointer sweeps over them, but nothing happens when i let go (regardless of where i let go). the tab i tried to move remains unmoved, and the tab name oddly remains italicized unless i click on it again to "reset" it.. this lasts several minutes at least. i usually go on with other things and forget it until some time later when it's working again.

wondering if this has to do with uBlock or uMatrix since i see a different script blocker listed as Tree Tabs- incompatible. But since this glitch is intermittent, I can't say, and it's not enough for me to quit on Tree Tabs.

aside from that, it's perfect--a dream extension. BRAVO.