Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.5b) Gecko/20030808 Problem: Mozilla goes into an infinite loop of opening new browser windows and creating new copies of a file that is trying to be opened. This occurs when Mozilla is set to automatically open the file with the default application and Windows has Mozilla associated as the default application for that filetype. Steps to reproduce: 1. Attempt to open a .cpp file with Mozilla. 2. Specify that Mozilla always use the default application to open .cpp files. 3. Windows "Open file with ..." dialog opens. Specify Mozilla as the default application. 4. Mozilla will open a new browser window every time it attempts to open the file and will create a copy of the file, tacking a -1 onto the filename each time, i.e. foo.cpp -> foo-1.cpp -> foo-1-1.cpp -> etc This not only uses up system resources by continually opening new browsers, but it can use up all of the space on the hard drive. This will probably work with other file extensions, but .cpp is the one that I experienced it with.

this is already reported and is not security sensitive

*** This bug has been marked as a duplicate of 167320 ***

reopening; the use case with "mozilla as default application" vs "mozilla explicitly specified as helper app" should be kept separate, imo... the latter is much easier to fix.

"fix" in the sense of "detect and disallow"

*** Bug 230772 has been marked as a duplicate of this bug. ***

*** Bug 323119 has been marked as a duplicate of this bug. ***

See also bug 218257, which suggests a solution for Firefox (don't allow choosing Firefox as the helper app).

(In reply to comment #0) > Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.5b) Gecko/20030808 > > Problem: Mozilla goes into an infinite loop of opening new browser windows and > creating new copies of a file that is trying to be opened. This occurs when > Mozilla is set to automatically open the file with the default application and > Windows has Mozilla associated as the default application for that filetype. > Confirmed using 3.6 and .swf files. Not a showstopper but very confusing for newbies trying to open files.

Just noticed this was an old bug - sorry. Whatever the issue was then is recurring in 3.6. Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)