uBlock Origin Lite
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Item media 1 screenshot
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A permission-less content blocker. Blocks ads, trackers, miners, and more immediately upon installation.

uBO Lite (uBOL) is a *permission-less* MV3-based content blocker. The default ruleset corresponds to uBlock Origin's default filterset: - uBlock Origin's built-in filter lists - EasyList - EasyPrivacy - Peter Lowe’s Ad and tracking server list You can add more rulesets by visiting the options page -- click the _Cogs_ icon in the popup panel. uBOL is entirely declarative, meaning there is no need for a permanent uBOL process for the filtering to occur, and CSS/JS injection-based content filtering is performed reliably by the browser itself rather than by the extension. This means that uBOL itself does not consume CPU/memory resources while content blocking is ongoing -- uBOL's service worker process is required _only_ when you interact with the popup panel or the option pages. uBOL does not require broad "read and modify data" permission at install time, hence its limited capabilities out of the box compared to uBlock Origin or other content blockers requiring broad "read and modify data" permissions at install time. However, uBOL allows you to *explicitly* grant extended permissions on specific sites of your choice so that it can better filter on those sites using cosmetic filtering and scriptlet injections. To grant extended permissions on a given site, open the popup panel and pick a higher filtering mode such as Optimal or Complete. The browser will then warn you about the effects of granting the additional permissions requested by the extension on the current site, and you will have to tell the browser whether you accept or decline the request. If you accept uBOL's request for additional permissions on the current site, it will be able to better filter content for the current site. You can set the default filtering mode from uBOL's options page. If you pick the Optimal or Complete mode as the default one, you will need to grant uBOL the permission to read and modify data on all websites. Keep in mind this is still a work in progress, with these end goals: - No broad host permissions at install time -- extended permissions are granted explicitly by the user on a per-site basis. - Entirely declarative for reliability and CPU/memory efficiency.

4.6 out of 5131 ratings

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DOOM GuYMay 22, 2024

Very good adblock. I don't know if it's related to ublock origin officially but works fine. Just sometimes the websites become slow

1 person found this review to be helpful
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David JacobsonMay 17, 2024

Only problem is it's not blocking ads on twitter anymore for some reason when it was the other day

2 out of 2 found this helpful
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Raymond HillDeveloperMay 17, 2024

X (formerly Twitter) changed it's domain name from twitter.com to x.com. Filter lists have to be updated to reflect this change. I just published an updated version of uBOL, it's currently pending review in the Chrome Web Store -- good chance it will have cleared review by tomorrow.

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Blue WallpaperMay 7, 2024

doesn't work on twitch

3 out of 12 found this helpful


  • Version
  • Updated
    May 20, 2024
  • Offered by
    Raymond Hill (gorhill)
  • Size
  • Languages
    51 languages
  • Developer
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.


The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes


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