Today I was working on a Joomla 2.5.7 site with a responsive template. Some image dimensions got saved in an article, so they wouldn’t behave responsively. As I went looking for a setting I remembered seeing to set “Always include dimensions” to “NO” I discovered that this is an option for the standard Image Manager that is not available in the Image Manager Extended. I uninstalled the JCE pluggin and all of my editor icons disappeared. The “toggle editor” link displayed, but wouldn’t work.
Off to google and the JCE forums — some people had success with other browsers — indeed, Chrome and Safari were fine with JCE. Someone suggested clearing the browser cache — I did, but still no go in Firefox.
I uninstalled JCE, reinstalled 126.96.36.199 and the File Manager but NOT the Image Manager Extended. Still no go in Firefox. Finally I 1. Quit Firefox, 2. Restarted Firefox, 3. Cleared the Cache (again) and all was well.
Not sure what the bug is, but Firefox takes some extra TLC.
Happy to have found a sequence that solved it for this site. Now I’m off to a Joomla 1.5.27 site where I had given up on JCE for similar symptoms. Maybe I can get it back again!