screenshotFlash Blocker Strict  |  Download Block all Flash contents from loading (whitelisting available).

Some of the important features of the Flash Blocker Strict addon are listed below. This is followed by an overview of this addon. This summary contains few words about the addon, its function, and its features. Next is FAQ, this section is useful to get information about how this addon works in your browser. If you couldn't find a specific answer, please fill the bug report form on this page or the contact form on the homepage to let us know about your question. Following the FAQ, is the bug report form. It is designed to collect user feedbacks and bugs about this addon. Users can suggest improvements or feature requests through this form too. The next section is for submitting comments about this addon which uses the Facebook comments plugin. The last section is dedicated to reports submitted through the GitHub website. We hope the information provided on this page, could help you get all the basics you need about this addon and enable you to have a better experience with Flash Blocker Strict.

In short, Flash Blocker Strict easily blocks all flash elements within a website! Plus, you can whitelist a domain to allow flash. Please check the YouTube tutorial below to get an idea of how this addon works in your browser. If you want to contribute to the developement of this addon, please fork it on GitHub, and push your changes to a named branch. Moreover, you can review all the comments made on GitHub commits.

5 Reasons to Use Flash Blocker Strict

  • Allows you to block all Flash elements with just one click.

  • Ultra-lite: no significant memory and CPU usage.

  • Has a whitelist feature (with context-menu) to allow websites load flash.

  • Improves your privacy and security while browsing.

  • Available for all browsers and platforms.

YouTube Tutorial

This video gives you an idea of how the extension works in your browser.

Matched Content

Frequently Asked Questions

  • 1. What is Flash Blocker Strict?

    Flash Blocker Strict is a browser addon that helps you easily block all flash elements within a website. Simply click on the toolbar icon (which serves as a toggle button) to turn the addon ON or OFF. When the addon is active, no flash content will be loaded in your browser. Badge icon text shows the number of blocked flash items. If you want to whitelist a domain from blocking, simply click on the toolbar icon to turn the addon OFF (icon is green when it is OFF). You can now reload the page to allow all flash contents. Alternatively, you can add any desired domain to the whitelist table. In order to do so, please right-click on the toolbar icon (in Chrome and Opera browsers), or anywhere inside the page (in all browsers), then select the - Exclude from flash blocker - item in the context menu. This way, the website will be added to the whitelist (please open options page to edit the whitelist). Now, reload the page to see all flash contents. Please note that toolbar icon will turn to green color when the website is whitelisted.

  • 2. How can I disable the addon?

    As mentioned above, toolbar icon serves as ON|OFF switch. Simply click on it to turn the addon off. When icon is red all flash elements will be blocked and when it turn to green, everything is allowed. Please note that, when the icon is green (addon is OFF) no badge icon will be shown.

  • 3. How can I download the source code for Flash Blocker Strict?

    To download the source code for this extension from Chrome Web Store, it is recommended to use Extension Source Downloader. With this addon, you can download the source code as a ZIP or CRX format to your machine. If you want to download the source code from the Firefox addons store, please open the firefox download link (if available) in the Firefox browser and then right-click on the - Add to Firefox - button and select - Save Link As... - item. Choose the destination folder on your machine and then save the file in XPI format. You can then rename the XPI format to a RAR or ZIP file. Some extensions may have a GitHub repo address, which you can use to download the source code as well. But, it may not be the latest version of the addon. Therefore, downloading the source code from the official web stores is the best option as it always gives you the latest version of the addon.

  • 4. How can I add a website (domain) to the whitelist?

    In order to allow flash for a domain (whitelisting a website) there are two options available. The first option which is available in all browsers is the in-page context-menu item. Simply right-click within a page and then click on - Exclude from flash blocker - item in context-menu. The website will be added to the whitelist. The second option is only available in Chrome and Opera browsers. If you have these two browsers, please right-click on the toolbar icon and then click on the - Exclude from flash blocker - in context-menu to whitelist the current domain. Please note that, only domain for the active tab will be whitelisted. Since Firefox browser does not have right-click context-menu, this option is not available for Firefox at the moment.

  • 5. Does Flash Blocker Strict has options page.?

    Yes, this addon has a very simple whitelisting feature in the options page. In order to add a specific domain to the whitelist, please add the desired domain to the designated area. Instead of a domain, you can add a URL to the input area as well, and the addon will automatically converts it to domain. Please note, all domains must be comma separated (i.e.,,, etc.). Likewise, when you remove a domain from the whitelist area, the addon will block flash again and the toolbar icon will turn to red color.

  • 6. Can I whitelist a website with regular expressions?

    No, unfortunately regular expressions are not supported yet. Currently, whitelisting is only possible with hostnames. Please note that you cannot whitelist a URL alone, once you enter a URL in the whitelist area the addon will convert it back to domain and Flash will be allowed for the whole domain.

  • 7. Is this addon available for mobile version of Firefox or other browsers?

    No, currently this addon is only available for desktop browsers (Chrome and Opera and Firefox). In future versions we will release it for safari and mobile browsers as well.

  • 8. Does this addon improves the security in my browser?

    Yes, it could potentially improve the security in your browser. Flash, in general, is notorious for security numerous issues, therefore blocking Flash contents while you browse can potentially improves the safety and security in your browser as well as your privacy. Blocking flash will also speeds-up your browsing experience and can save your internet bandwidth.


Reporting Bugs

Your feedback goes a long way towards making this addon even better. With this feedback and bug report form, you can report bugs or suggest features/enhancements for the functionality or performance of this addon. Please note that this form will be sent to the developer(s) of this addon. You will not get an immediate or personal response at the moment. However, the developer(s) may contact you through the email address provided in this form for further clarifications or to request additional information regarding the reported bug(s).

If you want to rate or write a review for this addon in the official webstore, please press the - Rate this addon - button below.

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Please be as specific as possible. Basically, describe what happened, what you were doing when it happened, and why you think it is a problem.

Describe the step-by-step process required to reproduce the issue you are reporting. Be specific when describing these steps by providing as much detail as possible.

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Reviews | Discussions

Please note: keep these reviews/discussions clean, and avoid the usage of derogatory or inappropriate language or terminology in references to individuals or groups based on race, national or ethnic origin, color, religion, age, gender, etc. Do not submit bugs in your reviews, use the above bug-report section instead. Also, never post any personal information in these reviews.