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How can I get interactive websites to work with Firefox?

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  • Last reply by cor-el

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In the last week many of the interactive websites I've been using for years suddenly stopped working properly. However they do work with Internet Explorer. How can I get them to work again with Firefox?

In the last week many of the interactive websites I've been using for years suddenly stopped working properly. However they do work with Internet Explorer. How can I get them to work again with Firefox?

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The diagnostic extension you ran (thank you) reports that your currently active personal settings folder (your Firefox profile folder) contains a user.js file. This file can be used to override your settings. Let's try taking that file out of the equation.

Open your current Firefox profile folder using

Help > Troubleshooting Information > "Show Folder" button

Scroll down to user.js and rename it to something like user_js.old

Hopefully then when you restart Firefox your preferences will stick.


Is JavaScript enabled here:

orange Firefox button (or Tools menu) > Options > Content


Can you give examples of some interactivity that isn't working, i.e., a URL and steps to re-create the problem?

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In what way are those websites not working?

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.