3 stars because if so many people say it works well, it has to be true... The interesting thing is, though, that it says I have installed this extension in my phone's browser (Firefox, latest version, using it on a phone with Android 16), but... when I open the Firefox app and check the list of installed extensions, this one is not listed. I can't find it anywhere, so I can't use it either. It must be something I'm doing wrong on my end, but I can't figure out what it is.