Deepl, is the most accurate system for translation.
Unfortunately, the add-on is not really useful. Lots of stuff is missing. For example the option to immediately display popup to Auto Translate on mouse selection in the Pop-up Bubble...
Dear developer, have a look at ImTranslator add-on, you will get some inspirations.
Thanks anyway. It's a good start.

This is puzzling. I can select text on a page and get a translation (albeit with a popup that won't go away) but there's no icon for translating an entire page. I've tried on both a major German newspaper and on a Danish science magazine, and there's nada. I've restarted my browser, although not my machine.

A nice add-on that does only the one thing it's meant to but this is done very good. And no third party software needed anymore where different APIs can be used.
Only the shortcut does not work for me, it always opens the Firefox library (German keyboard layout) and I experienced some glitches in online forms: when I entered text and then hit backspace the former text was still visible and new text was simply written over it which was pretty unreadable - turning off this add-on removed this behavior and turning it back on brought back the error so i suspect it's this add-on. Would be 5/5 if the key combination could be changed and the text glitches were gone.

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