RIP HTTPS everywhere it was nice knowing you
just noticed FF now has official HTTPS only mode in its options and it works great
1: it did fully work on sites HTTP every had issues with and i had to make special rules for or enable forced mode
2: it did not break down the sites that would break on on forced mode.
3: it gives clear warning on sites that it is not able to escalated to HTTPS mode
In short: Firefox built in HTTP only mode is way easier and has better results than HTTPS everywhere,
Options > Security & Privacy > Bottom section