I really liked this extension, and it worked great to stop me from visiting distracting sites. However, it looks like a recent Firefox update has broken it. I jumped into a debug window and I think that the problem is that Firefox now has a "loading" tab change sent before it actually sends the updated site. Slow Down seems to only look at the "loading" tab, not the actual site.

I don't usually write reviews, but I have to say that this addon is almost perfect.
Works like a charm and is privacy friendly!

Does the job, although it might take a few tries to enter the URL in the right format. I picked this one because it didn't require the "all web pages" permission that the other extensions of this type did - so I'm much more confident of my privacy.

Thank you! Very helpful) <3