As soon as I installed the addon it opened a new tab for themusic.io

It simply doesn't work

popup menu unresponsive on firefox 82.0 linux

This extension opens a tab to some weird partner website called themusic.io every time Firefox starts. This is so dumb I couldn't stand to test whether it works as advertised for Flash content, I instantly uninstalled.

Does not function. It reports that Flash elements are present (by number), in a page, but does not show them.

没有用