@firefoxwebdevs
Where is the full change log of android version located? I would like to find out which exact version introduced device/screen lock on private tabs - that seemed to be the issue.

@firefoxwebdevs
Not quite, sorry.
I rolled back to older version already.

@firefoxwebdevs
That's the first tying tried. The app works perfectly fine with or without but only when opening the tab list it differs from long delay.

I have tested with over 100 tabs in version 12x and it is still snappier than 147 with less than 50 tabs.

@firefoxwebdevs is 147 considered heavy-weighted (without the kill-switch)? Sometimes I need a lightweight Firefox to run on older androids and as usual as AI is I would rather give features up for performance.

As it stands right now 147 struggle to open tab lists.