I can't get it to work in Firefox 129.0. Also, I'm missing a hint, whether the regex-matches get excluded from CORS (then the default setting would be very dangerous), or included? And what when the button is set to disabled? Is the URL list in charge then? Or is it in charge, when enabled? And, do I have to match my local domain oder the remote?
So, in all, seems like a nice plugin, if it were working, and if it was more clear about what the settings mean.

Doesn't work in Firefox 124. No changes are saved or applied.

don't work

Does not work, even enabling in the UI is not saved.

It doesn't work. I failed to get my regex saved.

It just doesn't work, FF still blocks request even with wildcard CORS header.

Does not work with Firefox Developer Edition (65.0b8 (64-Bit)) and latest macOS update (10.14.2)

does not work on mac osx using firefox 59.0.2 (64-bit)

does not work

I use Firefox 56 64bit @ windows 10
after setup this add-one
the Apply Url is set just one url /.*/
BUT when i still have CORSD issuu with ajax post