It works great, and the design is minimally intrusive; thank you for making this.

Two suggestions: add a cancel button to cancel the deletion after it has begun, and show how many chats are yet to be deleted ("x of y deleted" or "x remaining").

And, as an added bonus, you could include the estimated time remaining. I just deleted 59 chats with this and every chat seemed to have a consistent amount of time required for deletion (about three seconds per chat). So a little "time remaining" bar shouldn't be difficult to implement.

And also a little chime (toggle-able on/off) would be nice to let the user know when the act is finished.

But simple and effective overall.

worked perfectly. it acts as a macro and does what it claims. if you examine the js (which you should before installing any addon) it doesn't contain stuff like fetch(), XMLHttpRequest, ajax, or navigator.sendBeacon..etc.
great job!

Much much better than nothing. Worked on Firefox Portable on Win11.

Works as promised.