User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050822 Firefox/1.0.6 (Debian package 1.0.6-3) Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050822 Firefox/1.0.6 (Debian package 1.0.6-3) If browser.xul.error_pages.enabled is true, then the error pages replace the current page in the back/forwards history rather than adding to it. This leads to data loss if the current page has unsaved form data. Reproducible: Always Steps to Reproduce: 0. Check that browser.xul.error_pages.enabled is true in about:config 1. Open a new tab and go to google.com or some other page with a form 2. Type something novel in the search box 3. Enter an invalid url in the location bar and hit enter Actual Results: The "page load error" page appears as expected, but the back button remains disabled. There seems to be no way to return to google and recover the form data. Expected Results: Treated the page load error as a normal page and added it to the history rather than obliterating the current page and all associated data, so that the form data could be recovered by stepping through the history.
Mozilla/5.0 (Windows; U; Win98; es-ES; rv:1.7.10) Gecko/20050717 Firefox/1.0.6 Same problem here.
*** This bug has been marked as a duplicate of 157004 ***