Fix broken plugin content on the Web with NoPlugin

Martin Brinkmann
Jun 8, 2017
Updated • Jun 12, 2017

NoPlugin is a browser add-on for Firefox, Chrome and Opera that has been designed to fix web content that requires plugins on the Internet.

Plugins are on their way out, with all major browser developers having announced that classic plugins won't be part of future browser versions anymore.

The web is moving to a HTML5 future, and plugins are a relic of the past. While Flash is still being kept around, at least for a little bit longer, depending on the browser that you are using, plugins other than Flash may not work anymore already.

See Firefox, DRM and the end of NPAPI, or Chrome launches without NPAPI plugin support for further information.

The removal of support for plugins however may have an effect on an Internet user's web experience. While browsers may not support plugins anymore, plenty of sites out there still require them for some content.

plugin not supported

If you visit such a web page in a modern browser, you usually get an error message. Chrome for instance displays "this plugin is not supported", and Firefox that the "video format or mime type is not supported".

The disabling of plugins in browsers makes this content inaccessible. While plenty of sites are using HTML5 now for their content, it is fair to say that some sites will never be updated. Pages or sites that are no longer maintained for instance, or sites for which the operator cannot or won't make the investment that is required.


NoPlugin has been designed as a solution for this issue. It is a cross-browser, open source, WebExtension.

Basically, what NoPlugin does is scan web pages that you visit for plugin content (embedded content).  Note that the extension is limited to media content.

Depending on the content, two things may happen. If the browser can play the content without plugins, the embedded content is replaced with a HTML5 player so that the content can be played directly in the browser.

If the content cannot be played, a download option is provided instead so that the content can be downloaded to the local system and played in a local player then.

The message on the screenshot below for instance links directly to the media file so that you can download it to your local system (This page is trying to load plugin content here. Click to open it in your media player).


A click on the open content button downloads the media file to the local system so that you can play it using any media player that supports the format (mov in this case).

NoPlugin may play mp4, mp3, m4a and wav files directly in the browser. Any other media cannot be played directly, but is provided as a download option instead.


NoPlugin has been created as a remedy to make left-behind media sites that rely on plugins to play content work in modern web browsers. The use of the extension depends largely on your browsing habits.

If one of your favorite sites requires plugins for instance, you will benefit from NoPlugin provided that it detects the embed code correctly on it and provides you with a download or direct streaming option.

Now you: Do you need plugins for some stuff on the Internet?

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  1. coakl said on June 12, 2017 at 10:19 pm

    re: ” Pages or sites that are no longer maintained for instance, or sites for which the operator cannot or won’t make the investment that is required.”

    Those are the sites more vulnerable to break-ins by hackers, and malware installed for drive-by attacks.
    The last thing you want to do is play plug-in content from them.

    If a site doesn’t serve up HTML5 video correctly, I simply ignore them.
    If you must look at the content, look for it elsewhere (Google the description or title).

  2. Doc said on June 12, 2017 at 6:20 pm

    “…that is been designed to…” **That has been designed to….*** – past tense.

    “While browser’s may…” **Browsers** – don’t use an apostrophe in a simple plural.


  3. jupe said on June 8, 2017 at 5:14 pm

    I couldn’t get it to work on this site either,

    It’s the only one I was hoping to use it for, pity.

  4. Heimen Stoffels said on June 8, 2017 at 10:41 am

    Too bad it’s a WebExtension, if it was a traditional add-on I could’ve installed it on SeaMonkey (which is currently my browser of choice).

    1. TianlanSha said on June 8, 2017 at 5:04 pm

      For better or worse the last mainstream browser (Firefox) will be ditching traditional add-ons and many people are unsatisfied, and from what I’ve been told, things look a but uncertain for projects like Sea Monkey and Pale Moon. So I don’t know what you folks plan to do, but I try to not get too picky to the point where my primary browser is a niche one with uncertain future. I like customization and non-traditional nerdy browsers, but I’ve had too many trouble with them, like Vivaldi, Pale Moon, K-Meleon, Sea Monkey.

      1. beemeup4 said on June 9, 2017 at 6:41 am

        Other Gecko-based browsers may have an uncertain future, but Pale Moon is stable. NPAPI will stay for the foreseeable future on Pale Moon. which will make Pale Moon the only option available if you need to use an NPAPI plugin in the future. I know in some countries ID cards are used in conjunction with a plugin and in such cases Pale Moon will fill the hole left by all the other browsers.

  5. TianlanSha said on June 8, 2017 at 9:57 am

    It doesn’t work for me on both Firefox and Chrome on the websites:

    On Ektoplazm it’s supposed to have a flash player for each album, when I disable flash in Chrome, and install this extension, it doesn’t do anything, still acts like I don’t have flash.

    On MMOSITE, there is supposed to be an embedded flash object at the top with the top news sliding one after another, also nothing happens.

    I’m not saying it’s not working at all, it just doesn’t seem to do anything on websites that I know and use often, and I’m too lazy to bother doing any further diagnostics.

    1. Corbin said on June 15, 2017 at 7:21 am

      Hi there, I’m the developer of NoPlugin. At this time, NoPlugin doesn’t support Flash content, but I’m looking into it.

    2. Martin Brinkmann said on June 8, 2017 at 10:26 am

      I guess, and this is just a guess as I did not investigate further, that it depends on how the content is embedded on the site. Maybe the author of the add-on will come along and explain why the add-on does not work on the site’s you mentioned.

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