good, but lacks usability. Rated 3 out of 5 stars

I recently started using FoxReplace but it lacks some essential functionality. I really need a quickbar to insert replacements as I browse webpages. I strongly recommend that spaces are NOT removed automatically. This makes word replacements a real pain since especially in the german language there are countless compound words that get mutilated. Will I have to use regular expressions for that?

This review is for a previous version of the add-on (0.12.2). 

I don't fully understand your problem, but have you tried using the whole words option? It should avoid cutting words in half.