Rated 4 out of 5 stars
I'm wanting something like the old Firefox macOS icons. However, you don't have support. I'm asking if you could get it on full support instead of limited?This review is for a previous version of the add-on (184.108.40.206).
You can install CTBs beta versions on Firefox for MacOS and only use the icon options. https://addons.mozilla.org/addon/cstbb/versions/
The add-on is on limited support for MacOS and Linux, because it is intended to offer old Windows features for Windows version of Firefox. Not everything possible on one OS is working the same way on another OS.
You can use all CTB options on MacOS, but some might not work properly, others however to work correctly. There is no reason not to install beta versions as they are the same as the default release version (last beta=release), but only tested on Windows by AMO editors.