Blackout for Firefox This Firefox add-on darkens the screen with a single mouse a click and restores it back the same way
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color dark dark color scheme article readability darken weh page darken

Blackout for Firefox Description

Blackout is a Firefox and Google Chrome extension that applies a dark color scheme to the current web page, helping users to read articles better in a dark environment. Blackout is an open source add-on designed to work with Mozilla Firefox 1.4 or later, as well as with the Google Chrome web browser. Product's homepage

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