After firefox 30 was installed this week the browser is slow but will not allow navigation away until finished
After firefox 30 was installed this week the browser is slow on sites with a large amount of information, data to set up,or many pictures or videos but will not allow navigation away until completely finished. Stop and back does not help it just continues the original site. Prior to release of 30 although slow it did allow navigation away or back.
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Hello dexrek
Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that turns off some settings, disables most add-ons (extensions and themes).
If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:
- In Firefox 29.0 and above, click the menu button
, click Help 
and select Restart with Add-ons Disabled.
When the Firefox Safe Mode window appears, select "Start in Safe Mode".
If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.
To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.
also, in your system details we can see that you have in yourprofile folder a User.js file.
(The user.js file does not exist by default. If you create the file forget it, if not, delete the User.js file. Note that some programs create and write in the User.js file also).
thank you
yes Firefox in safe mode will work with the slow browser so please try it and share your experience so that more user will get benefited with it.