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Have you tried system restore to a point before the Firefox update? 
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Have you tried system restore to a point before the Firefox update?

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Thanks guys. I'm away on business at the moment, so I'll try your suggestions when I get home.
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Thanks guys. I'm away on business at the moment, so I'll try your suggestions when I get home.

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Karl_mark,<br />
Any luck? &nbsp;Any more issues?
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Complete reinstall did the trick. There was an issue because I was running it on a home domain so some information was being held in a redirected folder.
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Complete reinstall did the trick. There was an issue because I was running it on a home domain so some information was being held in a redirected folder.

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I've been running Firefox with no problems on my Windows 7 64 Bit Enterprise system.<br />
Then, an update is installed and it no longer loads (something about versions incompatible). I suspected an add-on had caused this so I uninstalled Firefox, deleted all folders relating to Firefox and reinstalled Firefox 3.5.10 from scratch. No I get an error saying:<br />
<br />
'The procedure entry point js_NextActiveContext could not be located in the dynamic link library js3259.dll'<br />
<br />
Any ideas on how to get this working again?
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I've been running Firefox with no problems on my Windows 7 64 Bit Enterprise system.
Then, an update is installed and it no longer loads (something about versions incompatible). I suspected an add-on had caused this so I uninstalled Firefox, deleted all folders relating to Firefox and reinstalled Firefox 3.5.10 from scratch. No I get an error saying:

'The procedure entry point js_NextActiveContext could not be located in the dynamic link library js3259.dll'

Any ideas on how to get this working again?

Firefox 3.5.10 won't run Windows 7

Web browsers are applications used primarily to display documents, files and media from the Internet, identified by a Uniform Resource Identifier (URI) that can be a page, image, video or other file. Some browsers require the use of add-ons or extensions to safely render the information they receive; others have systems built into them to perform the same functions.