If you keep tabs open for days and don't open them, like me, you might want to try a tab suspending extension. There's noticable lag when I open a tab I haven't

If you keep tabs open for days and don't open them, like me, you might want to try a tab suspending extension. There's noticable lag when I open a tab I haven't opened in hours, but my FF on Ubuntu is fine with ~100 open tabs.