Ultimate Brightness Control

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Dim or boost any webpage from 10% to 200%. Works in fullscreen videos and iframe players too. Free. Ultimate Brightness Control — the only brightness extension that keeps working when a video goes fullscreen. Most extensions place an overlay on the page. When a video enters fullscreen, the browser moves it above that overlay and the dimming disappears. Ultimate Brightness Control solves this by injecting the overlay directly into the fullscreen element — so it works on YouTube, Dailymotion, and any iframe video player. - Brightness range from 10% to 200% — dim for late-night browsing or boost washed-out screens - Fullscreen-safe — dimming stays active when video enters fullscreen or iframe players - Site-specific settings — set different brightness for each website, saved automatically - Global brightness — one slider controls all tabs at once - Instant effect — changes apply in real time as you drag the slider - 100% private — no accounts, no analytics, no data collection Click the extension icon on any page, drag the slider to your preferred brightness. Enable "Apply only to this site" to save a custom value for that domain. Use "Disable here" or "Disable everywhere" for quick toggles. This extension does not collect, store, or transmit any personal data. All settings are saved locally in your browser using Chrome's built-in storage API. No third-party services, no tracking, no ads. - storage — saves your brightness preferences locally - tabs — reads the current tab's URL to apply site-specific settings

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