Hi,

Sorry to hear that. Here are some standard troubleshooting steps that may resolve the issue:

1. Please check if you have Enhanced Tracking Protection (ETP) enabled. You can do that by clicking the shield icon in the left part of the address bar.
   • If ETP is enabled, try disabling it.
2. If the problem is not fixed, try clearing Firefox cache.
3. If it does not help, try clearing cookies and data for the website you experience troubles with (warning: you will be logged out on this website).
4. If it also does not help, try running Firefox in Troubleshoot Mode. If the problem doesn't persist, please follow the steps from this article to troubleshoot further.

Does any of the above help? Looking forward to your update on how it goes!

I do every single step as mentioned above. I do find that the extension of F.B. Purity is the reason, when I disable it the blinking stops and when I re enable it the blinking happens again.

This problem doesn't happen before the last update of Firefox v.147.0.3

Any advice to resolve that?

Glad to hear that you've been able to identify the cause! The best next step would be to report the issue to the extension developer. Maybe something changed in Firefox extension API that also requires changes on their side.

To do that, find the extension on addons.mozilla.org (if you added it using that website) and click Support site / Homepage on the extension's page.

If you fail to find a way to contact the extension developers, you can report the extension to Mozilla by locating it on about:addons, clicking the three-dot/elipses button and selecting "Report".

I'll also mark your reply above as a solution to highlight it for other users.

I already contacted the add-on developer, report him all details and I am waiting his reply. Thank you.

Thank you!