Firefox crashes, have uploaded new version (8) and will not work unless I turn off my firewall, when I turn it back on again it crashes?

Everything was ok until early last week when Firefox kept on and on crashing. I downloaded the new version on Saturday and all was fine until I switched on on Sunday and nothing, zilch. Opened in internet explorer and all was OK so knew it had to be Firefox. I disabled my Firewall and all came on perfectly, as soon as firewall goes on again Firefox goes off. I have now done a system restore back thingy (I'm sure you know what I mean!!) to before the download and am now having to put up with it crashing when it feels like it. Also very slow and sticky. I am working on Windows 7 if this helps.
If this cannot be resolved satisfactorily I will change to Safari or Internet Explorer as this is not the first problems I have had with Firefox.

A possible cause is security software (firewall) 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 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.com/kb/Server+not+found
*https://support.mozilla.com/kb/Firewalls
Start Firefox in <u>[[Safe Mode]]</u> to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes
See also:
*http://kb.mozillazine.org/Firefox_crashes
*https://support.mozilla.com/kb/Firefox+crashes

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    ~~~~~~~~~~~~~~~
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