Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Video quality keeps dropping on a streaming site (Viki)

  • 1 reply
  • 1 has this problem
  • 9 views
  • Last reply by Zian

more options

Dear Support Team,

I have an issue with video playback on one particular site (www.viki.com) that only happens on Firefox as it turns out. Up until today I thought it was an issue with the site itself. While streaming videos on viki.com the video quality keeps dropping from full HD 1080p down to a measly SD 360p; they automatically adjust the video quality based on your internet speed, yet despite having a very stable connection (220mbps) it keeps constantly changing which is very annoying. The weird thing is, though, that this doesn't happen ALL the time, just for a select few (Chinese or Taiwanese) shows. Playing the same episode of one such a show on another browser (in this case Edge), however, is completely normal. Steady 1080p quality throughout. I don't have this problem on any other streaming sites with Firefox (Netflix, Youtube, Prime, etc.), either.

Is there a throttling misstep somewhere in config that I might have overlooked? As far as I know I haven't changed the settings on it.

Would appreciate any help you can provide as I'd rather not switch browsers to fix this issue.

Sincerely, Isabella

Dear Support Team, I have an issue with video playback on one particular site (www.viki.com) that only happens on Firefox as it turns out. Up until today I thought it was an issue with the site itself. While streaming videos on viki.com the video quality keeps dropping from full HD 1080p down to a measly SD 360p; they automatically adjust the video quality based on your internet speed, yet despite having a very stable connection (220mbps) it keeps constantly changing which is very annoying. The weird thing is, though, that this doesn't happen ALL the time, just for a select few (Chinese or Taiwanese) shows. Playing the same episode of one such a show on another browser (in this case Edge), however, is completely normal. Steady 1080p quality throughout. I don't have this problem on any other streaming sites with Firefox (Netflix, Youtube, Prime, etc.), either. Is there a throttling misstep somewhere in config that I might have overlooked? As far as I know I haven't changed the settings on it. Would appreciate any help you can provide as I'd rather not switch browsers to fix this issue. Sincerely, Isabella

All Replies (1)

more options

1. Hardware acceleration should be enabled to maximize video playback performance. Go to ☰->Settings->Performance, toggle Use Recommended Performance Settings to Off, enable Use Hardware Acceleration when available.

2. Turn off Enhanced Tracking Protection and disable your extensions in about:addons

3. Use Troubleshoot Mode (although this will turn off hardware acceleration)