Remove FireFox Selection Outline

Here are the steps:

1. Open your FireFox browser.
2. In the URL bar, type about:config and press enter.
3. In the box titled "Filter" at the top of the page, paste this in: browser.display.focus_ring_width
4. Double click on the only one that's there. A window will pop up with the number 1 in it. Change that number to 0.
5. Click Ok.

You're done....

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