the right-click save image as does not bring up a dialog box. this seems to be an old problem going back to 11.2. found many suggestions but no fix that works. have i missed an update or patch to firefox or kde with my 11.3 install?
i have not rewritten the .mozilla directory. i have rewritten the default profile (several times) in case something brought over from 11.1 caused the problem (passwords, bookmarks, plug-in, etc.) each time, the first save-as would work and then any following would not. just as reported in other threads.
did stumble onto one thing - if you select View Image Info, there is a save-as button in that dialog box that does work.
I had exactly same problem. I was no able to save images from Firefox, so I need to install some extensions to do this job. Now I’m using OS 11.3 with FF 3.6.8 and it’s working fine.
the only other browser i have installed is konqueror. at first it would not save either, but that may have been a java issue (security on imdb.com maybe, they have a bunch of jpg’s so i was testing with them.) after fiddling with it, it now saves.
i found a thread, on a ubuntu site i think, that had something about uninstalling some kde-mozilla runtime packages. xulrunner something. system went down last night and i lost the thread. now i can’t find it.