What are pep_tmp-xx directories in my Thunderbird profile?
I have 42 pep_tmp-xx directories in my Thunderbird profile. The xx stands for numbers from 1 to 42. Each of these directories is either 22.8MB or 23.8MB. Inside each of them there are several sub-directories and files as follows: pepmda Inside of which there are two directories: bin share and a file version.json
bin contains concrt140.dll gpgme-w32spawn.exe libetpan.dll libgpgme-11.dll msvcp140.dll pep-json-server.exe pEpEngine.dll vccorlib140.dll vcruntime140.dll
share has a PeP sub-directory then an HTML sub-directory with other files in it a PackageVersion file and a System.db file
What are they used for? I'm using Thunderbird 78.2.2 after upgrading from 68.12 and therefore I do not know if they preexisted.