Flashblock extensions and built-in click-to-play settings let you block resource-heavy, insecure Adobe Flash content by default. You can easily customize these extensions to add your favorite trusted websites to an “allowlist” (whitelist) so they can run Flash automatically. Method 1: Using the Extension Toolbar Popup
Most modern Flashblock iterations like Flash Block Plus or Flash Blocker Strict let you whitelist a site directly from the browser window. Step 1: Navigate to the website you want to allow.
Step 2: Click the Flashblock extension icon in your browser’s top-right toolbar.
Step 3: Click the Add to Whitelist button, or the Plus (+) icon.
Step 4: Refresh the page to automatically load the Flash content. Method 2: Customizing via Extension Options
If you want to manually type or copy-paste a list of multiple favorite websites, use the extension’s dashboard.
Open your browser’s Extensions / Add-ons manager (Ctrl+Shift+A on Windows/Linux or Cmd+Shift+A on Mac).
Find your Flashblock extension and click Options or Preferences.
Locate the text field labeled Whitelist, Allowlist, or Exceptions.
Enter the domain names (e.g., example.com or *.example.com to include subdomains). Click Save or Add. Method 3: Using Built-in Browser Whitelists
Because browser developers phased out native Adobe Flash support, modern use cases rely on web emulators (like Ruffle) or specialized site permissions. If your browser blocks interactive site elements, you can use the built-in identity settings to manage permissions: How to Control Which Websites Can Use Flash in Any Browser
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