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.: Hello. A couple of days ago Firefox stopped displaying thumbnails of YouTube videos. I tried YouTube on other browsers and the thumbnails appeared as usual. On Firefox, they've disappeared, but only on my Windows 10 computer. The YouTube thumbnails appear on Firefox on my MacBook. The attached graphic shows what it looks like on my Win 10 computer.

Any ideas on how to solve this would be greatly appreciated. I have also searched the Internet and YouTube for a solution, but was unable to find one that works.

Thank you.

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Firefox is no longer supported on Windows 8.1 and below.

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Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release. 143.0.1 Firefox Release

September 19, 2025 Version 143.0.1, first offered to Release channel users on September 19, 2025 Fixed

   Fixed a tab crash experienced by some users caused by DLL injection. (Bug 1872261)

   Reference link to 143.0 release notes.

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Putting people before profits since 1998 ___________________________________________________ Wierd. Thanks. Greg

Using your browser as my default and going to https://bracingviews.substack.com/p/yes-its-about-the-oil, https://jonathancook.substack.com/p/western-elites-fear-a-globalised and https://georgehazim.substack.com/p/murdochs-australian-manufacturing, regular sites where I comment often, since Thursday there's no visible button to post my comment. Never encountered that before.

Using another browser, I can comment in Jonathan Cook and George Hazim's Blog but not in Bracing Views

Moderator note: This question has been edited to fix a link.

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This error is shown however if I refresh the page sometimes the page freezes as if it lost connection and sometimes it reloads as per normal with the video playable.

Youtube does not work. It shows somekind of default page that is essentially blank. It does say: "Try searching to get started" and "Start watching videos to help us build a feed of videos you'll love."

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I'm not sure why, but starting a couple of days ago Firefox will not load a couple (there may be others) of my regularly used sites - the page just 'hangs' or only partially loads:

facebook.com theguardian.com

These are on my Windows 11 PC which I use 95% of the time. They load fine on my Windows 10 laptop which has the identical Firefox settings (they are Synced) with the same Extensions.

I have uninstalled and reinstalled Firefox on my PC to see if this helps, but the issue remains.

The websites load fine using Chrome on my PC.

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Marrose

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I downloaded the Opera browser last night and it has no problems with this site. I won't use chrome or edge.

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Win 10 on desktop. FF version 145.0.1 the site in question https://experience.arcgis.com/experience/ba70b3d86f5e4bbeb7582591f3dde16a/

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