A few months and a complete change of location (I’m in Helsinki right now!) later, ImageTweak is going to reach version 0.19.
I had to scrape all the work I already did for 0.19 because I hit a few roadblocks, and so I had to start over with a minor but longstanding bug: proper drag&drop support. What it means is that you won’t have to hold CTRL anymore when performing drag&drop. The price is that I had to drop support for firefox 2.x and 3.0.x.
I just added it on AMO. As soon as it gets reviewed it will be available for download.
p.s. I also enabled donations on AMO, so if you feel like it please support the development of ImageTweak.