I'm speculating here, but perhaps an open tab has some content from weather.com, or maybe one of your add-ons uses data from weather.com. Could you test in Firefox's Safe Mode? That's a standard diagnostic tool to deactivate extensions and some advanced features of Firefox. More info: [[Troubleshoot Firefox issues using Safe Mode]]. ''If Firefox is not running:'' Hold down the Shift key when starting Firefox. ''If Firefox is running:'' You can restart Firefox in Safe Mode using either: * "3-bar" menu button > "?" button > Restart with Add-ons Disabled * Help menu > Restart with Add-ons Disabled and OK the restart. ''Both scenarios:'' A small dialog should appear. Click "Start in Safe Mode" (''not'' Refresh). Any difference? ---- If you get a lot of unresponsive script messages, one possible explanation is a problem with the protected mode feature of the Flash player plugin. That feature has security benefits, but seems to have compatibility issues on some systems. There is a hidden setting to disable it: (A) In a new tab, type or paste '''about:config''' in the address bar and press Enter. Click the button promising to be careful. (B) In the search box above the list, type or paste '''flash''' and pause while the list is filtered (C) Double-click the '''dom.ipc.plugins.flash.disable-protected-mode''' preference to switch its value from false to true. This might not take effect until all Flash has been unloaded for a few minutes, or you close Firefox.