Many sites throughout the Internet play videos automatically when you visit them. This can be video content that is published on the site or in form of advertisement displayed on the site.
In the case of advertisement, most sites mute these videos by default but some are pushing it and turn on audio as well.
Most web browsers ship with muting functionality to counter these without you having to hunt the tab where the sound is coming from these days, but muting won't stop the video from playing.
Auto playing videos are worse on mobile as most users are not on an unlimited plan which means that they eat away the monthly bandwidth quota and may also slow down other transfers while they play.
The following guide provides you with information on how to stop the auto playing of videos in desktop and mobile web browsers. Please note that some browsers don't offer functionality to block videos from playing automatically.
I have talked about this back in 2015 and while the article still holds true for the most part, updates have been released and new methods discovered that justify this new guide.
Also, it covers popular browsers besides Firefox and Chrome as well.
Flash vs HTML5
Websites and services use two technologies when it comes to videos: Flash or HTML5. Flash is on a downwards spiral but still used especially when desktop browsers are used to connect to sites, but HMTL5 is the rising star that is taking over (and dominant on mobile platforms).
Flash content can be set to click to play in most browsers which prevents it from loading automatically. This means however that you will have to click on those elements on web pages if you want the content to play.
Another difference between Flash and HTML5 media is that HTML5 media will still be downloaded (buffered) even if you block it from playing automatically.
Firefox users can block the auto play of Flash and HTML5 video in the web browser directly without the use of add-ons.
Firefox and HTML5 videos
Starting with Firefox 41, Mozilla's implementation has become even better in regards to HTML5 videos that autoplay.
As is the case for many things in Firefox, a preference is provided that defines whether HTML5 videos play automatically or not.
The following method works for desktop and mobile versions of Firefox
This blocks auto playing HTML5 videos in the Firefox web browser.
Firefox and Flash video
Flash video is only an issue on the desktop, and the best option to deal with it (besides removing Flash completely from the system), is to set the plugin to click to play so that it only activates when you want it to.
Once done, all Flash content is not loaded by default but only when you allow it to.
Google Chrome for the desktop and the mobile version of the browser share many similarities but also fundamental differences.
Mobile Chrome does not support extensions or plugins for instance which limits it significantly when it comes to auto playing content on the Internet.
Chrome and HTML5
Google Chrome ships without an option to block HTML5 videos from auto playing.
Extensions are available that aim to fill the gap, but since mobile Chrome does not support extensions, they are only of use when it comes to the desktop version of the web browser.
This means that there is no way currently to block auto playing HTML5 videos in the mobile Chrome browser.
Here is a short selection of extensions that you may want to try:
Chrome and Flash
The following applies only to the desktop version of the Google Chrome web browser as the mobile version does not support plugins including Flash.
This blocks Flash content from playing automatically on sites that you open in the browser.
The Opera browser is based on Chromium/Blink (the same source as Google Chrome). It support plugins and extensions only on the desktop version.
Opera and HTML5
Just like it is the case for Google Chrome mobile, Opera mobile does not support an option currently that allows you to stop HTML5 videos from auto play.
If you are using the desktop version of Opera, you may install extensions for the browser to block autoplaying media elements:
Opera and Flash
To disable Flash from playing videos automatically in the Opera web browser, do the following:
Microsoft Edge and Internet Explorer don't offer options to block videos from playing automatically currently.
Both let you disable Adobe Flash but that will block Flash on all sites and is not really a good option if you need it at times.
While things won't change for Internet Explorer, there is still hope for Microsoft Edge as Microsoft plans to launch extensions support this Summer.
Since it is easy to port Chrome extensions to Edge, it is possible that the HTML5 blocking extensions available for Chrome will find their way to Microsoft Edge to provide users of the browser with a reliable option to block videos from auto playing.
Vivaldi is a relatively new browser, also based on Chromium/Blink, that is currently only available as a desktop version.
It comes as no surprise therefore that the browser supports the very same methods to block videos from playing automatically as Google Chrome.
Vivaldi and HTML5
There is no official first-party extension store yet for Vivaldi, but you can download and install Chrome extensions by visiting the Chrome Web Store.
To block HTML5 videos from auto playing, install either of the following extensions:
Vivaldi and Flash
What you may not know about Vivaldi is that you can open the Chrome content settings in the browser as well which allow you to set plugins to click to play.
This prevents Flash video and audio content from autoplay in the browser.
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.