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A pop up ad came up, ever since EVERYTHING now says "Blocked due to x-frame policy" and browser is non-usable

  • 4 wótegrona
  • 1 ma toś ten problem
  • 16 naglědow
  • Slědne wótegrono wót jscher2000

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Hi, a pop up ad, or pop under ad that redirected a page I was on came up, and ever since that firefox has completely died, almost everything has been replaced with windows saying "Blocked by X-Frame-Options Policy" and as a result the browser is now useless.

How do I turn off x-frame policy?

Wšykne wótegrona (4)

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I would also like to add this includes Firefox blocking itself due to this x-frame policy

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Could you test in Firefox's Safe Mode? In its Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, any userChrome.css/userContent.css files, and some other advanced features to help you assess whether these are causing the problem.

If Firefox is not running: Hold down the option/alt key when starting Firefox. (On Windows, hold down the Shift key instead of the option/alt key.)

If Firefox is running: You can restart Firefox in Safe Mode using either:

  • "3-bar" menu button > "?" Help button > Restart with Add-ons Disabled
  • (menu bar) Help menu > Restart with Add-ons Disabled

and OK the restart.

Both scenarios: A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

Any improvement?

While you are there, could you check for possible rogue extensions. You can view, disable, and often remove unwanted or unknown extensions on the Add-ons page. Either:

  • Command+Shift+a (Windows: Ctrl+Shift+a)
  • "3-bar" menu button (or Tools menu) > Add-ons
  • type or paste about:addons in the address bar and press Enter/Return

In the left column of the Add-ons page, click Extensions.

Then cast a critical eye over the list on the right side. Any extensions Firefox installs for built-in features are hidden from this page, so everything listed here is your choice (and your responsibility) to manage. Anything suspicious or that you just do not remember installing or why? If in doubt, disable (or remove).

Any improvement?

Wót jscher2000 změnjony

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Hi, Thanks for the response!

I will make a note of testing in safe mode next time.

I was expecting to find a X-frame policy somewhere in firefox so I had been going through the menu's for awhile looking for them. However, I then went back to the site that gave me the pop up ad, looked at where its being redirected from, looked through my cookies, found 3 cookies from the popup's origin site, deleted them. And now everything is working just fine again.

Every site appeared to be blocking the pop up ad's cookies.

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I'm glad you found such a simple solution. Please also review your extensions to make sure nothing new is lurking there.