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Sometimes, the arrow keys stop working to scroll pages. Sometimes, in Firefox -> Tools -> Options -> Advanced -> Accessibility -> General, the first checkbox, about using arrow keys to scroll pages, appears checked and some other times, unchecked. When it's unchecked, I check it. When it's checked, I keep it checked. In both times, I click OK. Then, the arrow keys restart working to scroll pages. I'm having to do it all the time. What should I do?

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I had the same problem.....F7 fixed it :)

Browse with caret allows users to select arbitrary content with the keyboard and move through content as if inside a read-only editor. This allows copying arbitrary pieces of text to the clipboard. The F7 key toggles this feature on/off.

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