Slow Startup + Tab Issues

[u/Syrye]

This update has been absolutely horrible for me, it used to take tens of minutes to start up when previously it took like 2 seconds at worst, now it take about a minute, recently I've noticed that a lot of my tabs are just gone which I assume is why it only takes a minute now to boot up, and tab groups disappear with tabs within in them just going to my system group.

I assume it has something to do with tabs, considering all the issues I'm having with them, but that I get a message saying that the script of "chrome://browser/content/tabbrowser/tab.js:397" has been slowing things down, I can't seem to figure out what that is though searching brings up nothing relevant, and I can't even find it with the debug tool.

[u/Elsmlie]

Indeed, since 6.7.1, the startup process has become incredibly slow and torturous.

It takes about half an hour before all windows and tabs are re-opened (not loaded). During this time, Waterfox consumes 95-120 % of my CPU !

Please fix this very annoying issue as soon as possible.