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I have Firefox 5 now, in the admin section of my web site when I edit a change in the data it does not make the change on my data file. There was no problem in my previous version.

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How can I return to a previous version that did not have problem? On Safari on my lap top Mac, I do not have this problem. We tried this on another Windows computer with a 3.5 or 3.6 Firefox version and there was no problem.

How can I return to a previous version that did not have problem? On Safari on my lap top Mac, I do not have this problem. We tried this on another Windows computer with a 3.5 or 3.6 Firefox version and there was no problem.

Modified by James

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When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site. Note: this is likely to log you out, so finish up whatever you are working on first.

1. Clear Firefox's Cache

orange Firefox button or Tools menu > Options > Advanced

On the Network mini-tab > Offline Storage : "Clear Now"

2. If needed, delete the site's cookies here

While viewing a page on the site, right-click and choose View Page Info > Security > "View Cookies"

Then try reloading the page. Does that help?

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Some sites appear to be incompatible with Firefox 5. The difficulty is tracking down the problem. To see whether it is caused by the new stricter HTML parser in Firefox 4+, you can turn that off. Please save any unfinished work first.

(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.

(2) In the filter box, type or paste html5 and pause while the list is filtered

(3) Double-click html5.parser.enable to toggle it to false (it should turn bold).

Then return to the problem page, reload and try again. Does that make any difference?

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Here's the process to roll back if needed:

First, I recommend backing up your Firefox settings in case something goes wrong. See Backing up your information. (You can copy your entire Firefox profile folder somewhere outside of the Mozilla folder.)

Next, download and save Firefox 3.6 to your desktop for future installation. http://www.mozilla.com/firefox/all-older

Close Firefox 5.

You could install Firefox 3.6 over it (many have reported success) or you could uninstall Firefox first. If you uninstall, do not remove your personal data and settings, just the program.

Unless you have installed an incompatible add-on, Firefox 3.6 should pick up where you left off. If there are serious issues, please post back with details.