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firefox plays a youtube video, but safari does not on MacBook air 2021. Why?

Why is Safari having frequent issue playing youtube videos when firefox does not on my MacBook air 2021?

MacBook Air 13″, macOS 11.3

Posted on Jun 16, 2021 2:20 AM

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Question marked as Top-ranking reply

Posted on Jun 16, 2021 3:05 AM

Go step by step and test.


1. Update Safari, if an update is available. Update may come with bug fixes.

    https://support.apple.com/en-us/HT204416

    https://support.apple.com/en-us/HT201541


2. Quit Safari, launch Safari holding the Shift key down. Test.

    https://support.apple.com/en-us/HT203987


3. Startup in Safe Mode. https://support.apple.com/guide/mac-help/start-up-your-mac-in-safe-mode-mh21245/mac.  

    Quote:

    It also does a basic check of your startup disk, similar to using First Aid in Disk Utility

    And it deletes some system caches, including font caches and 

    the kernel cache, which are automatically created again as needed.


4. Clear History

    https://support.apple.com/guide/safari/clear-your-browsing-history-sfri47acf5d6/mac

    Please read the article before clearing history, 

    this is like a low level resetting of Safari without affecting passwords and bookmarks.


5. If Safari doesn't open a webpage or isn’t working as expected

    https://support.apple.com/en-us/HT204098

1 reply
Question marked as Top-ranking reply

Jun 16, 2021 3:05 AM in response to dbafromla

Go step by step and test.


1. Update Safari, if an update is available. Update may come with bug fixes.

    https://support.apple.com/en-us/HT204416

    https://support.apple.com/en-us/HT201541


2. Quit Safari, launch Safari holding the Shift key down. Test.

    https://support.apple.com/en-us/HT203987


3. Startup in Safe Mode. https://support.apple.com/guide/mac-help/start-up-your-mac-in-safe-mode-mh21245/mac.  

    Quote:

    It also does a basic check of your startup disk, similar to using First Aid in Disk Utility

    And it deletes some system caches, including font caches and 

    the kernel cache, which are automatically created again as needed.


4. Clear History

    https://support.apple.com/guide/safari/clear-your-browsing-history-sfri47acf5d6/mac

    Please read the article before clearing history, 

    this is like a low level resetting of Safari without affecting passwords and bookmarks.


5. If Safari doesn't open a webpage or isn’t working as expected

    https://support.apple.com/en-us/HT204098

firefox plays a youtube video, but safari does not on MacBook air 2021. Why?

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