User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6 Opening a file via calling Firefox with a file argument with german umlauts in its path name in a new tab is rejected with an error message. The file opens correctly when firefox is not configured to tabbed browsing. Reproducible: Always Steps to Reproduce: 1. Configure Firefox for tabbed browsing: tools/options/advanced/tabbed browsing/a new tab in the most recent window! 2. Start a new browser window! 3. Open a file with german umlaut in the os environment (delivered by calling the executable with argument)! for example "Tützpatz.html" Actual Results: -> Error Message: "The file (f.e. T%FCtzpatz.html) cannot be found" for every file -> except the first <- in an opened browser window. Expected Results: Every other file schould be handled exactly as the first, as long as the first file is handled correctly, as it is. Workaround is to not use tabbed browsing, at least not before the files are listed in the history or in the bookmarks. URLs activation from there works correctly. For some reason, the file name seems to be differently parsed when opened in a new (additional) tab as opposed to be opened in the first tab. This should be avoided!

I imagine this is a symptom of bug 263570

Right. That seems so. I didn't check for closed reports this time. Excuse me. I have a little addition to this behaviour from last minutes actions, which I didn't found in that long lasting bug report: The problem is -> not entirely <- related to having Firefox already opened or not. It -> sometimes and randomly <- refuses the URLs in question when those URLs are the first handled by a newly opened browser window (when no tabbing mode is configured). This happens, if a lot of files shall be opened (for example for printing). Thus this behaviour seems to be related to some time dependend activity (which would fit to the fact that it happens whenever a browser window is already opened). If you are sure about having this bug fixed, ignore this. Otherwise it could possibly give some hint.

Harry, could you please test this in the latest builds and see if this is still a problem? http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla1.8/ (I recommend starting Firefox with firefox.exe -P and creating a new profile to test this in. http://kb.mozillazine.org/Profile_Manager)

Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b4) Gecko/20050905 Firefox/1.0+ ID:2005090509 WFM

WFM too. Reporter, if you still see this issue with firefox 1.5 beta 1 then feel free to reopen. I'll dupe this because its almost certainly the same issue. *** This bug has been marked as a duplicate of 263570 ***