Friday, November 4, 2016

Best Flash and HTML5 Blockers for Google Chrome and Opera

The best and safest flash and html5 blockers for Google Chrome and Opera webbrowser and detailed instructions on how to use them

Note: Since these links will show some images I advice you to disable images temporarily in Chrome/Opera browser settings first (click on the three dots on the right upper side of Google Chrome or on the menu tab in Opera, then enter “settings”, in settings search “images”, go to “content settings”, click “do not show any images”, press “done”. Now all images are disabled. To activate the images again in order to use an extension instead for blocking images, follow the same steps.


Flashcontrol for Chrome and Opera is the only flash blocker I currently recommend since it blocks more flash content than any other flash blocker I know of:

Note: Most browsers that are based on the Chromium source code, such as the Vivaldi browser, should be able to install extensions directly from Google Chrome Web Store.

In order to install this for Opera, you must first install this extension below which allows you to install Chrome extensions on your Opera webbrowser:

After having installed the above extension for Opera, visit this link and you will now be able to add it into your Opera webbrowser:

Note: You will have to enter your extensions after having added to Opera in order to manually install it. Opera should notify you about this and if you click on the notice, it will take you automatically to the extension.

This flash blocker will block every website from automatically playing or displaying flash content (such as youtube flash videos or other websites’ videos), which means that you cannot see movies or things that are flash related playing or showing their content automatically without you first having given your authorization.

Note: If you use other flash blockers than those I recommend, you might encounter various problems, such as that pdf files won’t show themselves without disabling the flash blocker etc., and other possible conflicts with other extensions.

Disable HTML5 Autoplay

But in order for the above flash blocker to work properly, you need also to download and install an extension that blocks html5 content from automatically playing on youtube and on other websites that you are browsing, such as this one:

Here is the direct download link for Google Chrome:

Here is the direct download link for Opera (it is recommended to use the native addons for Opera rather than the Chrome versions when they are available):

Note: Since html5 is becoming the new standard online, is not enough with just a flash blocker anymore; and most youtube videos are also automatically played with the new html5 format when available.

I know of no flash blocker in Google Chrome or Opera that automatically also blocks html5. But with both of these addons activated at the same time, however, there won’t be a problem.

The only problem with this html5 blocker is that it does not hide the still frame of the paused video but with Wizmage activated at the same time, you won’t see the image anyway unless you click on it (see the info on Wizmage Image Blockers for Google Chrome and Opera above).

Note: If you want youtube to autoplay, go to a youtube video, then click on the “Disable HTML5 Autoplay” icon, and press “Disable nothing”.

Now youtube will be on autoplay, with the additional plus that you won’t see the film screen unless you unhide it with Wizmage*, and you will also get the additional plus that the youtube captions or subtitles will still work and show itself even though the film screen is hidden. This is great for those who do not want to see the videos and only listen to the audio!

This is how I watch youtube my self unless I take the youtube link and download the video in mp3 instead through “youtube to mp3” websites or programs (enter the link without images on, of course, since I have no idea of what it may show!).

* Since there is an issue of the video screen “continuing to be shown” after you have unhidden it with Wizmage and you go to a new video, it is highly important that you refresh your browser BEFORE going to the next video (or, if it works, you can manually hide the video screen again before going to the next video by clicking alt + z (alt + a shows the image, alt + z blocks it)).

Note: If you use an extension that forces youtube to play videos in flash rather than html5 format, then the video won’t play at all as long as Fast Image Blocker is activated. And this is obviously a problem, because if you disable Fast Image Blocker or add youtube as an exception in Fast Image Blocker and only use Wizmage Image Blocker, then the youtube comment thumbnails won’t get blocked at all (Wizmage is just not good enough in blocking all images), and the additional problem of not all images being disabled immediately will occasionally occur.

In order to avoid this problem on youtube, it could be advisable to install an extension that forces youtube to always play their videos in html5 format instead:

Here is the direct download link for Google Chrome:

Here is the direct download link for Opera (it is recommended to use the native addons for Opera rather than the Chrome versions when they are available):

But I’m not sure if this is really necessary, since youtube already should play all videos in html5 format if this is available. But if you have the problem that videos won’t play on youtube with Fast Image Blocker enabled, you may have to install the above addon or uninstall other addons or flash blockers that I have not recommended.

Note: The above extension can force youtube to play videos either in html5 or flash format. After you have installed it, flash is on by default. Click on the icon, then select the html5 icon on the right side and change it to the html5 format. The program should now say in the text below the flash and html5 icons: “YouTube HTML5 Player is Active”. You can now right click on the extension and click “hide in Chrome menu”, or enter the extensions in Opera en check “hide”, so that you don’t have to think about it anymore.

If you still can’t watch youtube videos with Fast Image Blocker enabled, delete all your addons and reinstall them again or remove those you think are suspect. Also read this section for more information that can be helpful in solving this problem.


  1. Hi there I am so excited I found your site, I really found
    you by accident, while I was looking on Google for something else, Anyways
    I am here now and would just like to say thank you for a
    marvelous post and a all round interesting blog (I also love the theme/design), I don't have time to browse it all at the minute
    but I have book-marked it and also included your
    RSS feeds, so when I have time I will be back to read much more,
    Please do keep up the superb job.

  2. Appreciate this post. Let me try it out.