I found two links concerning Firefox ESR browser extensions.
You just copy and right click to select the extension option label for translation. Of course, the Dialect program can do the same with a translation button. Still, I say that the LibreTranslate web page can almost replace Google Translate web page. It’s too bad that its installation for offline use requires a Docker installer. I don’t know what’s Docker, but I don’t think I would need it compared to Flatpak/Flathub. Plus, the upload/download function is not 100% perfect when it comes to dependency dependent web pages. So it’s back to the drawing board with a browser extension or Dialect.
This post usually irrevelant to the topic at hand, but given the fact that Chromium is being affected in the light of Google’s alleged surveillance in Chrome’s incognito mode, I am getting quite doubtful of the service connected to Chromium.