Tab Sleep Timer Fix Firefox

Tab Sleep Timer Fix

Put any tab on a sleep timer to close or mute the tab when the timer expires.
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Features & Capabilities

Tab Sleep Timer Fix

Tab Sleep Timer Fix is an essential Chrome extension that addresses a critical bug in the original Tab Sleep Timer by Daniel de Haas. The original add-on stops working when timers are cancelled, causing inconvenience for users who rely on timers to manage their browser tabs. This fixed version restores stability and ensures that you can put any tab to sleep reliably.

With Tab Sleep Timer Fix, you can set a sleep timer on any browser tab to automatically close or mute it after the timer expires. This helps manage tab clutter and saves system resources without manual intervention.

Please note: This fix is temporary and maintained until the original author updates the extension. If the original Tab Sleep Timer gets fixed, this version will be discontinued.

Key Features:

  • Fixes timer cancellation bug in original Tab Sleep Timer
  • Enables setting timers to close or mute tabs
  • Helps improve browser performance by managing tabs automatically
  • Temporary fix pending original extension update

User Growth & Download Statistics

Manifest V2 Add-on
By:
Mitch Crane
Daily users:
1,807 2
Rating:
4.86
(7)
Version:
1.0.5 Last updated: 2026-04-02
Version code:
6205937
Creation date:
2021-08-21
Risk:
Moderate risk impact Moderate risk likelihood
Permissions:
Size:
40.52KB
Email:
mi*****@gmail.com
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-17
Compare stats and ranking:

Ranking

# 2,296 ▲ 2
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Other platforms

Chrome
Sleep Timer Fix (v1.0.5)
55 3.00 (2)

For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Mitch Crane
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/sleep-timer-fix/
Email:
mi*****@gmail.com

User Reviews

Nice, but apart from "Close" and "Mute", I suggest "Reload", so that the music really stops but the tab is not lost ("Unload" would be nice but I get into trouble). I also made a few minor improvements. Here is my diff, fell free to integrate or modify it: diff -u1 -r sleep_timer_fix-1.0.5/background.js sleep_timer_fix-1.0.5+reload/background.js --- sleep_timer_fix-1.0.5/background.js 2026-04-02 20:31:06.000000000 +0200 +++ sleep_timer_fix-1.0.5+reload/background.js 2026-05-22 19:08:09.692509102 +0200 @@ -11,2 +11,15 @@ + let tabTimerConfig = tabTimerConfigsMap[currentTab.id]; + if (!tabTimerConfig) { + tabTimerConfig = { + tabID: currentTab.id, + isRunning: false, + expirationBehavior: 'reload', + numSeconds: 0, + targetTime: null, + }; + tabTimerConfigsMap[currentTab.id] = tabTimerConfig; + } + + const cancelTimer = () => { @@ -16,3 +29,4 @@ } - delete tabTimerConfigsMap[currentTab.id]; + tabTimerConfigsMap[currentTab.id].isRunning = false; + tabTimerConfigsMap[currentTab.id].numSeconds = 0; }; @@ -27,3 +41,3 @@ const statusForConfig = tabTimerConfig => { - return !tabTimerConfig ? { numSeconds: 0, isRunning: false, expirationBehavior: 'close' } : { + return !tabTimerConfig ? { numSeconds: 0, isRunning: false, expirationBehavior: 'reload' } : { // FIX #7: Guard against negative countdown values @@ -38,14 +52,2 @@ if (message.type === 'updateNumSeconds') { - let tabTimerConfig = tabTimerConfigsMap[currentTab.id]; - if (!tabTimerConfig) { - tabTimerConfig = { - tabID: currentTab.id, - isRunning: false, - expirationBehavior: 'close', - numSeconds: 0, - targetTime: null, - }; - tabTimerConfigsMap[currentTab.id] = tabTimerConfig; - } - if (tabTimerConfig.isRunning) { @@ -69,5 +71,3 @@ } else if (message.type === 'updateExpirationBehavior') { - if (tabTimerConfigsMap[currentTab.id]) { - tabTimerConfigsMap[currentTab.id].expirationBehavior = message.newExpirationBehavior; - } + tabTimerConfigsMap[currentTab.id].expirationBehavior = message.newExpirationBehavior; // FIX #6: Send a response to close the message port cleanly @@ -105,2 +105,5 @@ switch (tabTimerConfig.expirationBehavior) { + case 'reload': + chrome.tabs.reload(tabID); + break; case 'close': diff -u1 -r sleep_timer_fix-1.0.5/popup/popup.html sleep_timer_fix-1.0.5+reload/popup/popup.html --- sleep_timer_fix-1.0.5/popup/popup.html 2026-04-02 20:31:06.000000000 +0200 +++ sleep_timer_fix-1.0.5+reload/popup/popup.html 2026-05-22 18:20:50.738805149 +0200 @@ -56,2 +56,6 @@ <div class="expiration-behavior-option-container"> + <input type="radio" name="expiration-behavior" id="reload-behavior" data-expiration-behavior="reload"> + <label for="reload-behavior">Reload tab</label> + </div> + <div class="expiration-behavior-option-container"> <input type="radio" name="expiration-behavior" id="close-behavior" data-expiration-behavior="close">
by Mi*****, 2026-05-21
by 远离*****, 2025-03-31
by 远离*****, 2025-02-17
View all user reviews ›

Is Tab Sleep Timer Fix Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Tab Sleep Timer Fix requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Tab Sleep Timer Fix is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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