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When I view CNN live video and HBO Go video on Firefox 58.0.2 on my Mac, the video displays in a small horizontal window instead of full screen.

  • 10 پاسخ
  • 2 have this problem
  • 1 view
  • آخرین پاسخ توسّط AustinPowers007

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I tried unchecking hardware acceleration to see if this might help, but Firefox wouldn't allow me to do this in the Adobe Flash settings.

I tried unchecking hardware acceleration to see if this might help, but Firefox wouldn't allow me to do this in the Adobe Flash settings.

All Replies (10)

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Many site issues can be caused by corrupt cookies or cache.

  • Clear the Cache and
  • Remove Cookies

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

Type about:preferences<enter> in the address bar.

  • Cookies; Select Privacy. Under History, select

Firefox will Use Custom Settings. Press the button on the right side called Show Cookies. Use the search bar to look for the site. Note; There may be more than one entry. Remove All of them.

  • Cache; Select Advanced > Network.

[v57+] Select Privacy. Across from Cached Web Content, Press Clear Now.

If there is still a problem, Start Firefox in Safe Mode https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

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PLEASE help with this. I can't possibly be the only one experiencing this issue.

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Did you follow the instructions in my last post?

Did you try Safe Mode?

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I turned off hardware acceleration and that didn't fix the problem.

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I've never had this problem before in Firefox, by the way.

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This is the url for CNN live video. I continues to display only a thin horizontal video window, kind of like a letterboxing effect but with actual content being removed from the top and bottom:

http://go.cnn.com/?stream=cnn

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Type about:support in the address bar and press Enter. Under the main banner, press the button; Copy Text To Clipboard.. Now in the Reply Box on the forum page, do a right-click in the box and select Paste.

This will show us your system details. No Personal Information Is Collected.

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Maybe this is related to using a HiDPI (retina) screen with very large screen dimensions like your screenshot suggests.

If this only happening when a Flash player is used or also with a HTML5 media player?

Modified by cor-el

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It seems to be only happening when a Flash player is used in Firefox, but the CNN live video works perfectly well in Safari. I prefer to use Firefox and don't like switching browsers to view CNN and HBO video content. There must be a way to fix this within Firefox.

Modified by AustinPowers007

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PLEASE HELP! Someone must have a solution. If it works on Safari, it should work on Firefox.