I'm unable to open a new tab on my window, what do I do?

hello evanso, can you try to replicate this behaviour when you launch firefox in safe mode once? if not, maybe an addon is interfering here... [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]]

You can also try to update to Firefox 18. *Help > About Firefox *https://support.mozilla.org/kb/update-firefox-latest-version ---- Another possible cause to consider is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program. Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process. See: *https://support.mozilla.org/kb/Server+not+found *https://support.mozilla.org/kb/Firewalls