New tabs create a "Firefox cannot find server" error, but pages will load if refreshed.
Since the upgrade to 3.6.12, any time I open a new tab, I get a "Firefox cannot find the server" error. If I refresh the page, it will load normally (usually), although sometimes the page loads incorrectly, in basic text without any graphics or formatting. Further refreshing seems to correct the problem.
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Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
- Don't make any changes on the Safe mode start window.
See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
- Use "Disable all add-ons" on the Safe mode start window to disable all extensions.
- Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")