Rated 3 out of 5by Olgar, 7 years ago
The extension is very useful for people who are curious about what font a page is using. However, my problem is that it slows Firefox down dramatically on my computer (Fedora 22, Firefox 39, 2.2 GHz dual-core with 2 GB RAM). I know, not a high-end machine, but without this extension, everything is pretty snappy. I use several other extensions and none of the others have this problem.
Developer responseposted 7 years ago
This is the simplest of all extensions with barely 50 lines of code and only has access to webmail sites - so it's probably not the culprit or you would see many more reviews like this one.