Tree Style Tabs slow to load on firefox startup with less than 10 tabs

[ghepzz]

hi, i've been using tree style tabs and firefox for years, until someday it slowed down
problem: takes around 5 seconds or so for less than 10 pinned tabs plus extras
before (i think 2019 or so): it was instant and firefox had more than 50 tabs,

currently chrome also have 50 tabs, but also instantly loads the browser,

im pretty sure i haven't touched the settings, must be when firefox updated itself sometime ago

i googled: tree style tabs too slow to load, and how to make firefox faster,
i turned off "loading all tabs",
refreshed firefox(a new copy) and then added tree style tab
and the problem is a little bit servere (although it was taking 10 or so seconds to load 10 pinned tabs) but now it takes 5 seconds to load more tabs which is more reasonable

running win10 64bit, 8gb ram thanks

[irvinm]

If you disable TST, does Firefox load as quickly as you expect with the same number of tabs? (Thinking to see if this is more of a Firefox or a TST related item)

[neyder]

Hi, I got the very same problem, then disabled, tree style tab, and now Firefox tabs loads less tan a second after with 3 windows and many more tabs.

[Montagnard11]

Same here when restoring the windows from Firefox settings at startup or later from TabSessionManager plugin, even with the "Tree Style Tab" option OFF. Worth mentioning: I recently downgraded FF from v121 to 115ESR.
Restoring 9 windows, 264 tabs: forget it.

[neyder]

Hi, I got the very same problem, then disabled, tree style tab, and now firefox tabs loads less tan a second after with 3 windows and many more tabs.

[neyder]

I can confirm that delay on loading pages, also after disabling TST tabs loads as fast as they can.

[anhcoi123]

I got the same problem here. After I disabled Tree Style Tab, firefox run fast (normal) again. With TST on, it tooks ~2-3 Minutes for firefox to get ready on Firefox Startup. With TST off: about 10-20 seconds

[piroor]

Anyway I need more help with debugging experts... I could not reproduce such a painful slowing-down at the startup on my environment so I cannot investigate the root problem which triggers the slowing-down on my environment.