Fullscreen Clock
Fullscreen Clock is an open-source Firefox extension that shows the current time in the top-right corner when a web page enters fullscreen mode. It is intended for users who need a visible clock while watching or presenting fullscreen content.
Overview
4 featuresIn the Browser DevTools & extensions space, Fullscreen Clock takes a focused approach. It focuses on keeping track of the current time while viewing web pages in fullscreen mode. It is built as an open-source project for firefox users who browse content in fullscreen mode. Fullscreen Clock is open source under the Open Source license. It runs on the web and embeddable surfaces.
Behind Fullscreen Clock is upsuper, and it first shipped in 2026. Key capabilities include fullscreen clock, current time display, and top-right placement.
Summary written by a language model from the project’s public pages.
- Fullscreen clock
- Current time display
- Top-right placement
- Firefox integration
Built with & integrations
Trust & compliance
Indexing history
1What PulseGate has recorded for this listing
- Indexed20 Sep · 10:22 UTCFullscreen Clock verified via Firefox Add-onsSource: Firefox Add-ons · Open
Frequently asked questions about Fullscreen Clock
- What does Fullscreen Clock do?
- Fullscreen Clock focuses on keeping track of the current time while viewing web pages in fullscreen mode. It is catalogued under Browser DevTools & extensions on PulseGate.
- Who should use Fullscreen Clock?
- Fullscreen Clock is an open-source project built for firefox users who browse content in fullscreen mode.
- Is Fullscreen Clock free?
- Yes — Fullscreen Clock is open source under the Open Source license and free to use.
- What platforms does Fullscreen Clock run on?
- Fullscreen Clock runs on the web and embeddable surfaces.
- Is Fullscreen Clock still maintained?
- Unverified. Fullscreen Clock has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
- What projects are similar to Fullscreen Clock?
- Similar projects tracked by PulseGate include Clock, Film Clock, and Digital Clock.ClockFilm ClockDigital Clock
- Who makes Fullscreen Clock?
- Fullscreen Clock is developed by upsuper.
- How long has Fullscreen Clock been around?
- Fullscreen Clock first shipped in 2026.
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