Thanks much for providing this extension!

When I switched to Thunderbird, I deeply regretted having to give up the editor and spell-checker I had been using, EZQUOTE and JSPELL (shelled from the former).

But these are DOS applications that do not understand long filenames. I could not use
EZQUOTE without making a small modification to External Editor. Though I know very little Javascript, I was able to substitute a 8+3 temporary filename by truncating the Subject and Time.

I suppose, few people today are interested in DOS editors, however, the two applications mentioned above still have some advantages over more current offerings. So, perhaps in a future version of External Editor, you might consider adding an option for 8+3 temporary filenames.

Cheers!