HI, try this :

• https://www.howtogeek.com/341690/how-to-prevent-videos-from-autoplaying-in-firefox/

there is also a couple here if just want to be able to click that on or off :

• https://addons.mozilla.org/en-GB/firefox/search/?platform=windows&q=stop+autoplay

Please let us know if this solved your issue or if need further assistance.

Thanks. This solved the problem.

Not working. Yahoo and AOL still insist on playing their stupid videos automatically.

The pref that controls auto-play has been changed in the current Firefox release (63.0.1) to an Integer value.

• media.autoplay.default = 0

When the first two prefs listed below (or at least user-gestures-needed) are true then there is also a setting available in "Options/Preferences -> Privacy & Security -> Permissions" and you can inspect and modify the exceptions.

• media.autoplay.enabled.user-gestures-needed = true
• media.autoplay.ask-permission = true
• media.autoplay.default = 0 [0=Allowed, 1=Blocked, 2=Prompt]

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

• http://kb.mozillazine.org/about:config

See also:

• https://support.mozilla.org/en-US/kb/block-autoplay

This is not working for me.

I just logged onto Reuters and the first article I read had a Video running in it, albeit the audio was off.

Any other ideas?

Hi portman, were you using the original solution for Firefox 60?

For Firefox 63

The old preference is obsolete. Mozilla is planning to add a media autoplay permissions section to the Options/Preferences page once the settings have completed full testing and interface design. For now, you can use what's available in this "work in progress."

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful or accepting the risk.

(2) In the search box above the list, type or paste autop and pause while the list is filtered

To set your preferred behavior:

Block autoplay by default

• Double-click the media.autoplay.default preference and set it to 1
• Double-click the media.autoplay.allow-muted preference to switch the value from true to false

=> Does that work for you?

Ask on a site-by-site basis (default for "Nightly")

• Double-click the media.autoplay.default preference and set it to 2
• Double-click the media.autoplay.ask-permission preference to switch the value from false to true
• Double-click the media.autoplay.enabled.user-gestures-needed preference to switch the value from false to true

Allow autoplay by default (default for Release)

• Double-click the media.autoplay.default preference and set it to 0 (or right-click > Reset)

If there is still a problem on Reuters, could you provide a link to the page that autoplays video?

See also this extension:

• Disable HTML5 Autoplay https://addons.mozilla.org/firefox/addon/disable-autoplay/