This is it. I'm done with Page Translator, but you don't have to be. Fork the repo. Distribute the code yourself. This is now a cat-and-mouse game with Mozilla. Users will have to jump from one extension to another until language translation is a standard feature or the extension policy changes.

You might try this extension: https://github.com/andreicristianpetcu/google_translate_this It does the same thing in the same way as Page Translator and likely will be blocked by Mozilla, but this is a cat and mouse game worth playing if you rely on full-page in-line language translation.