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I downloaded the new version of Firefox and it will not open certain of the addresses that I use to run my business. How can I delete this version and go back to the previous version? thank you

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I would like to revert back to the previous version of Firefox. Please tell me how to do this

I would like to revert back to the previous version of Firefox. Please tell me how to do this

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1. Go to: http://releases.mozilla.org/pub/mozilla.org/firefox/releases/4.0/win32/

2. Click on the folder that matches the language you would like (en-US is united states English)

3. Download Firefox Setup 4.0.exe and install it in place of the newer version.

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hello and thank you for your suggestion. I have tried it and, when trying to open a program which I previously was able to, still get the following message: Remote XUL




         This page uses an unsupported technology that is no longer available by default in Firefox.
       


       Please contact the website owners to inform them of this problem.

Seems unbelievable that I previously had no problem and now I do. Have you any suggestions to overcome this? Do you think I can go back further in Firefox history to get a version that will make it possible to access this. Many thanks! Lynn

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Use this extension to set up a Remote XUL whitelist.
https://addons.mozilla.org/en-US/firefox/addon/remote-xul-manager/

Firefox 4, 5, and later versions will need that whitelist for web sites that continue to use the older remote xul.