Update: It does work after all. The instructions for this add-on are terrible. There is an extra step they don't tell you to do: You need to go into the add-on's options, then under "misc" you need to set the "path to executable" to point to your Chrome.exe so it can connect to Chrome. I'm bumping this up to four stars because it does work (I really needed this, so thank you), but the directions need to be clearer.

Thank you to "Anonymous user eb6512" who explained this process in his/her review.

(Previous review: Doesn't work. Followed the directions exactly. Restarted Firefox. Clicking on the "Open in Chrome" button does absolutely nothing.)