How to Disable and Remove Reader Button in Firefox URL Web Address Bar

 Firefox Reader is a feature that strips away clutter like buttons, ads, and background images, and changes the page's text size, contrast, and layout for better readability. Here's how you can disable it.

Browser Configuration
Type about:config into the URL bar of a new tab. You'll be warned with a message about tinkering with the browser settings. Go ahead and continue. Next you'll see a page full of options. In the search bar, put in reader.parse-on-load.enabled. This will filter the list of options down to the one option you need to change.

The result window should now display just one option, like in the screenshot below. You'll notice that the value is true. Double-click it and it should flip to false.



After changing this setting you'll need to refresh any open pages. I recommend restarting the browser.

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