By: em_te
Discards tabs that are inactive for 3 minutes to free up memory, while still preserving the tabs state when you click on them again. No privileged permissions required.
Features & Capabilities
User Growth & Download Statistics
- By:
- em_te
- Daily users:
- 113 -1
- Rating:
- 4.42 (12)
- Version:
- 0.3.3 Last updated: 2020-09-17
- Version code:
- 5100353
- Creation date:
- 2019-04-12
- Risk:
- Low risk impact Low risk likelihood
- Permissions:
- Size:
- 21.49KB
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-18
- Compare stats and ranking:
- Simple Discard Tab vs Automatic Tab Discarder
- Simple Discard Tab vs Discard stale tabs
- Simple Discard Tab vs Auto Tab Discard
Ranking
For Developers
Contact the developer
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User Reviews
While I like the app, I find it very annoying that it basically wipes clean any input you make on forms or submissions if you jump between tabs. Say you're filling in a long form an you are asked to add information you don't know by heart and you switch tabs to search for it - all input you've added up to that point gets wiped clean and you have to start all over again. It should allow you to set your own timeframe to when it clears memory.
by MR*****, 2025-06-03
Perfect - just what I wanted: Automatically discard open tabs after some (adjustable) amount of time.
Background: I'm a "use multiple instances of Firefox distributed over my many virtual desktops, each one with quite a few tabs, e.g. 10 to 20". Without this tool I get memory readings easily well above 10's of GB - which is kind of "problematic" :-)
Clicking on a discarded tab later on, more or less, instantly recovers it (as long as the date inside Firefox's cache was still valid - as far as I understand it) - which is perfectly fine! I prefer waiting "a second" compared to - Firefox is eating up my RAM.
What I wonder most is, why Firefox itself hasn't inbuilt this feature now (mid of 2025)...
PS: Ever wondered what Firefox is doing right now / which tab uses what amount of memory?
Check out Firefox's "about:performance" and "about:unloads" pages. The first one shows you how much memory/cpu your tabs (and a few other things) are currently using. And about:unloads gives you a list of all active tabs (so already discarded ones don't show up there) - and especially: When did you last view them and how much RAM do they use.
about:performance updates automatically, about:unload, you have to reload it manually to get an updated view...
PPS. If you are going to check if the add-on works correctly, give it enough time. E.g. if you have the initial discard timer set to 3 minutes and the last accessed time would be 9:00:03, then the tab will not be discarded at 9:03:03. The add-on runs only every full minute (as I've understood it), so at 9:04:00 the Add-on checks, that the page hasn't be used for more than 3 minutes and discards it...
by Sc*****, 2025-05-24
by 全民*****, 2025-04-07
Is Simple Discard Tab 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.
Simple Discard Tab requires very minimum permissions.
Risk impact analysis details
- Medium Enables sending notifications which can be spammed but have minimal direct security impact.
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.
Simple Discard Tab has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
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