This is the support thread for the Tap-To-Tab extension.
For some reason Tap to Tab stopped working with imgur.com. I am using FF 75 for Mac but I think it stopped already with with version 74. I have not found problems with other web sites so maybe Imgur has done something which prevents correct behavior of this extension.
I noticed this same behavior on my Windows machine as well. I have not used it a lot but the FF was already version 75. The extension worked fine at first with imgur.com but in a minute it stopped. My guess is that the extension was updated and that’s why it stopped working.
The Imgur bug was fixed in a recent release.