Rated 5 out of 5 stars

Got fed up with Boing and tried the convoluted installation, and said BS, F this. Followed another reviewer's instructions, and added more to it.
Click DOWNLOAD NOW and save the .xpi file, go to TOOLS then ADD-ONS, click on the sprocket, then click INSTALL ADD-ON FROM FILE, select the .xpi file, click OPEN and INSTALL NOW, and Bob's your uncle.
Works on 52.9.1 (32-bit). Kudos to the author.