Rated 5 out of 5 stars
Thanks. I love this, and have been using it for quite a while. However, I too was baffled when my save dialog box (also called the "save as" window by some people) stopped working.
I took two full days to figure it out. Countless forum entries, endless research, suggestions for many knowledgeable individuals...and nothing was working. I assumed this was due to the v38 Firefox update, so the majority of the troubleshooting was in that area.
In the end, not a single one of the people who were kind enough to help me were able to figure it out, and I stumbled upon the solution myself....it was THIS ad-on!
Thankfully, the note on their page said simply to install the latest version to fix the problem. I did, and the problem was gone.