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Device guide

Keep the screen on in Firefox

Firefox 126 and later keep the screen on natively while the AwakeTab tab is visible, on Windows, macOS, Linux and Android. Firefox shipped the Screen Wake Lock API in May 2024. On older versions, AwakeTab offers a video fallback after one tap. Firefox refuses the lock at 5 % battery or less while not charging, so plug in for long sessions.

Sources checked Saturday, 26 September 2026 3 min read By Soubhik Biswas
  • Firefox 126 or later
  • Low battery refused at 5 % or less
  • Older Firefox video fallback after a tap
  • Extension not for Firefox

Try it

Start a session, switch tabs, then come back and watch the pill.

Ready Suggested · 30 min
Starts when you open this tab
30:00

ends at

How AwakeTab knows

    Session complete

    Keeps awake for
    30:00
    ends at
    Keeps awake for
    30:00
    ends at of 30 min
    30:00
    ends at
    Keeps awake for
    30:00
    ends at

    Stopped to save battery

    Keeps this screen on while this tab stays visible.

    Ends Until you stop

    Type any time. A time that has already passed today means tomorrow.

    ends at

    How long?

    ends at

    Share this session

    Waits for a tap to start.Starts keeping the screen awake as it opens.

    Is AwakeTab doing its job?

    Your rating

    Time's up. Keep going?

    Settings

    How AwakeTab behaves. Every change saves as you make it.

    Timer Ask to extendJust stop · · Notifies youNo notification
    When time is up
    End sound Chosen in Customize, with the focus sounds.
    Clock Follow language12-hour24-hour · Seconds shownNo seconds · English
    Clock format
    Language English
    Focus Pomodoro lengths, breathing and your intention
    Device and privacy Battery stop onBattery stop off · Shortcuts onShortcuts off · Usage data onUsage data off
    15%
    AwakeTab stops the session at this level.Turn on the switch above to choose a level.
    Pro Your plan and the devices it covers. See what's in Pro Manage devices
    Reset to defaults

    Every setting here goes back to its default. Your notes, stats and Pro stay.

    What's new

    Version 2026.10.21 · a91a8c2

    Customize

    Make it yours. Every change shows on the clock at once.

    Every face shows the same time and state. Swipe the clock or press C to switch faces.

    Classic

    Retro

    Modern

    Your stats

    This week
    Today
    Streak
    All time

    time awake per day

    Pro keeps 12 weeks of history. See what's in Pro

    One row per day: date, minutes, sessions.

    Keyboard shortcuts

    Shortcuts need a keyboard. Without one, the buttons on screen do the same things.

    Session

    Space
    Start or stop
    1 6
    Presets 15 min–4 h
    0
    Until I stop
    U
    Until a time
    Esc
    Close or stop

    Screen

    F
    Fullscreen
    C
    Next clock face (Shift+C goes back)
    D
    Cycle theme
    M
    Cycle ambient mode
    P
    Floating window

    Tools

    S
    Sounds
    N
    Notes
    T
    Focus timer
    B
    Breathing guide
    I
    What you're working on
    ?
    This overlay

    Press ? or Esc to close. Single-key shortcuts can be turned off in Settings.Single-key shortcuts can be turned off in Settings.

    AwakeTab Pro

    $12 a year

    • More themes, lamps and backgrounds
    • A sound mixer
    • More notes
    • A repeating Pomodoro
    • Message mode
    • 12 weeks of stats

    Keeping the screen awake stays free, with no ads on the awake screen.

    Enter licence key Get Pro

    Clock

    Start a 30-minute session
    On this page
    1. Try it
    2. Set it up
    3. Which setups work
    4. What turns it off
    5. Honest limit
    6. Questions
    7. Related

    Set it up in Firefox

    Two steps start a session. The third is Firefox’s own low-battery rule, and the fourth is optional.

    1. Step 1: Open AwakeTab in Firefox and press Start

      Firefox › awaketab.com

      Wait for the pill to say "Screen awake". If it says "Tap to use the fallback" instead, this Firefox has no Screen Wake Lock API: update to 126 or later, or tap to use the video fallback.

    2. Step 2: Keep the tab visible

      No minimising while it runs

      Minimise the window or switch tabs and Firefox releases the lock. The pill changes to "Paused — tab hidden", and AwakeTab asks again when you come back.

    3. Step 3: Plug in when the battery is low

      Charger in, then Start

      At 5 % battery or less and not charging, Firefox refuses the lock or takes it back, and the pill says "Blocked — here's the fix". Plug in, then press Start again.

    4. Step 4: Optional: change the system timeout

      Windows: Settings › System › Power & battery

      This sets the screen timeout for every app. On a Mac, it is Apple menu › System Settings › Lock Screen. It stays changed until you set it back.

    Which Firefox setups keep the screen on

    These results come from Mozilla’s documentation and Firefox’s source, checked 26 September 2026. Real-device results appear here once recorded.

    SetupResultWhat to know
    Firefox 126 or later on Windows, macOS or Linux, tab visible Supported Native wake lock since 14 May 2024.
    Firefox 126 or later on Android, tab on screen Supported Leaving Firefox releases the lock.
    Battery at 5 % or less and not charging Blocked Firefox refuses or releases the lock. Plug in and press Start.
    Window minimised or another tab in front Pauses The lock is released until the tab is back in front.
    Firefox before 126 Video fallback Tap once to start it. It needs this tab visible and uses a little more battery.
    Stop automatically on low battery Not available Firefox removed the Battery Status API in version 52, so AwakeTab cannot read the battery level.
    AwakeTab browser extension Not available Firefox gives extensions no power API, so there is no Firefox version.

    What turns the screen off anyway

    When the screen still goes dark in Firefox, one of these is usually why.

    • A low battery At 5 % or less and not charging, Firefox itself refuses the lock.
    • A hidden tab A minimised window or another tab in front lets the display go.
    • Locking a Windows PC A locked PC hides the tab and turns the monitor off after 60 seconds. Windows 11 screen turns off after 1 minute
    • A Linux desktop that ignores the request Firefox can grant the lock while the desktop still blanks the screen. Keep the screen on in Linux

    Questions

    Why did Firefox stop keeping the screen on when my battery ran low?

    Firefox refuses a new wake lock, and releases a held one, when the battery is at 5 % or less and not charging. It is Firefox's own rule. Plug in and press Start again.

    Is there an AwakeTab extension for Firefox?

    No. Firefox gives extensions no power API, so an extension could not keep the screen on. The web app keeps it on while its tab is visible.

    Is the video fallback as good as the native lock?

    It keeps the screen on, but it needs one tap to start, needs the tab visible and uses more power than a native wake lock. On Firefox 126 or later you do not need it.

    Does it work in Firefox on Android?

    Yes, from Firefox 126, while the tab is on screen. Press Home or open another app and the phone goes back to its normal screen timeout.

    Soubhik Biswas

    Builds AwakeTab. Sources checked Saturday, 26 September 2026. About AwakeTab