Time Capsule Firefox

Time Capsule

By: maxlath
The best person to send you links matching your interests is a time-traveling version of yourself: set a periodicity when you bookmark a URL, and the tab will re-open in the future, be it an hour, a day, a month, a year, or a decade!

Features & Capabilities

The best person to send you links matching your interests is a time traveling version of yourself: create a time capsule by choosing when the current tab should be re-opened; this will bookmark the current tab, and program to re-open it in the future, according to the choosen periodicity, be it an hour, a day, a month, a year, a decade!

It will then re-open at this periodicity until the end of times. Or until you un-bookmark it.

Why would I need this?

  • Do you have a bookmark folder with 10,000 things-you-should-absolutely-keep-in-mind but never actually re-open once bookmarked? Now, if you don't come back to those things, those things come back to you!
  • Works very well when learning a new subject: you open many links which for most don't make sense now, but would probably make sense in a few months. (that worked awesome for me when learning web development).
  • Works very well as a memo/alarm mechanism: "Now isn't the time to deal with [enter the task on which you plan to procrastinate], but I got to see this page in X hours/days/etc."
  • In some ways, the logo may look like a bow tie. Bow ties are cool.
Top features
  • Super customizable periodicity: if the offered buttons aren't enough, click on the popup (to get focus on it) and start typing the precise number of a time unit you want.
  • Integrated with the browser bookmarks, which gives numerous advantages:
    • Pages you bookmark this way will show up when you're searching a page (if you activated bookmark suggestion)
    • All your time capsules are grouped in a folder in your bookmarks, which makes them easy to browse/search
    • Easy to export/import: simply import export your bookmarks and your time capsules will come along!
  • It's libre/open source
  • Built with the latest WebExtension standard: shouldn't break until next decade addon revolution
  • Comes with (poor) time-traveling jokes
If you feel the need but this doesn't match your expectations, you might be happy with the perfectly fine Snooze Tab addon.

Sending links to your past self isn't possible yet, but could come in a future version. It might be a premium feature reserved to generous donators.

Advices to keep it sane

  • Do not keep too many bookmarks with a short periodicity: that's gonna be very spammy.
  • Rule of thumb: if a tab re-opens 3 times, and you closed it immediatly the 3 times without considering acting upon it, deal with it now or un-bookmark it.
  • Avoid time paradoxes.
How does it works? It basically rely on an internal time vortex to send the links. See the code for more details.

See also If you like this addon, you might like this other project of mine: inventaire.io, a web app to share your books inventory with your friends!

User Growth & Download Statistics

Manifest V2 Add-on
By:
maxlath
Daily users:
40 -2
Rating:
4.25
(12)
Version:
2.4.1 Last updated: 2026-04-27
Version code:
6238034
Creation date:
2017-04-02
Risk:
Moderate risk impact Moderate risk likelihood
Permissions:
Size:
431.76KB
Email:
k+*****@maxlath.eu
URLs:
Website
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-19
Compare stats and ranking:

Other platforms

Chrome
Time Capsule (v2.4.0)
105 4.00 (6)

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:
maxlath
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/time-capsule/
Email:
k+*****@maxlath.eu
Website:
https://github.com/maxlath/time-capsule/issues

Permission Change History

2023-07-31: Version 1.0.4 → 2.3.3
Add Permissions: alarms menus storage

User Reviews

by 远离*****, 2025-04-20

by 全民*****, 2025-03-15

by Fi*****, 2024-08-07
View all user reviews ›

Is Time Capsule 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.

Time Capsule 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.
  • Medium ****** ** ********* *** ******* ******** **** **** *********** *** ********* *** ********* ******* *** *****
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.

Time Capsule 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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