I used to use this & rated it highly. It was useful & good program despite having to add another program to make it work.
I had to re-install FF & now this version added some hotkey that destroys my ability to use Alt+ codes for symbols.
I use those far more frequently than I use this add-on. No way is given to change the hotkey or to disable it. No fix in support group.
I have to uninstall it now.