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When I try to clear the cache the buttons grey out and do not work. I am frustrated with Firefox and may stop using it.

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When I try to clear the cache the buttons grey out and do not work. I am frustrated with Firefox and may stop using it. It will not let me sign in to my AT&T Yahoo email and their support says to clear your cache but I cannot get it to work.

When I try to clear the cache the buttons grey out and do not work. I am frustrated with Firefox and may stop using it. It will not let me sign in to my AT&T Yahoo email and their support says to clear your cache but I cannot get it to work.

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Make sure you do not run Firefox in permanent Private Browsing mode (Always use Private Browsing mode; Never Remember History).

  • Settings -> Privacy & Security
    Firefox will: "Use custom settings for history"
  • remove checkmark: [ ] "Always use Private Browsing mode"

If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock Plus, NoScript, DuckDuckGo PE, Disconnect, Ghostery, Privacy Badger, uBlock Origin) always make sure such extensions do not block content.

Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content.

  • click the shield icon for more detail and possibly disable the protection

You can check the Web Console for relevant-looking messages about blocked content.

You can check for issues with Total Cookie Protection.