User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; es-ES; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; es-ES; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3 If you click in a URL that contains a pipe ("|") and firefox starts, you will be asked to start a new session or restoring the webpages you were browsing as usual when firefox shutdowns quickly. Instead of loading the URL, firefox splits the URL with the "pipe signs" and it opens several pages with incomplete URLs. This happens because firefox saves the webpages urls you were browsing in the same way that "home page urls" in Preferences. So this problem will crash also in that feature. You can not have a home page with pipes in the URL. Reproducible: Always Steps to Reproduce: 1. Shutdown Firefox suddenly (so when you start it again, you will see the firefox window asking to start a new session or restore old one) 1. With other software (for example Word) create a link with a pipe, for example http://google.com/?bogus=blablah|blahblah 2. Click on it 3. Firefox will open, and choose you want to restore old session 4. URL will split into pieces with pipes Actual Results: In the example firefox will open your old webpages of the restored session and - http://google.com/?bogus=blablah - blahblah Expected Results: Open the complete URL: "http://google.com/?bogus=blablah|blahblah" As i said i think this will crash also in "Start home page" URLs in Preferences, because there are saved together joined by PIPE sign.