[Yoric]

> Not to mention Firefox is usually brought to its knees when trying to delete large segments of History/Cookies at once.

Is that still the case? I remember that one of the developers was seriously working on improving that.

[ainar-g]

Yes. The “magic number” seems to be 300 items on my machine. Anything above that will start to seriously freeze the browser.

[vikbytes]

Yep, still a problem for me last week, deleting entries numbering more than about 300 seems to be the magical breaking point.

[catalogia]

> Not to mention Firefox is usually brought to its knees when trying to delete large segments of History/Cookies at once.

Nine year old bug related to this: https://bugzilla.mozilla.org/show_bug.cgi?id=734643

The 'Library' window in general is clearly neglected trash. For instance it still doesn't get themed like the rest of Firefox.

[weaksauce]

I remember looking into this and it's a bit of a tangle. some of the oldest code in the codebase I think.