1638808 - Add a built-in adblocker

Status: NEW

(Firefox :: General, enhancement)

Description

[u663271]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0
Firefox for Android

Steps to reproduce:

Nothing

Actual results:

Third-party Ad-blockers from Mozilla Add-ons doesn't block ads effectively

Expected results:

Firefox is slower in terms of speed.
Firefox OS is open source as Chromium Open Source.
So, Some of Chromium Source code can be extracted for the highest speeds of firefox.
Instead of Sidebar. History Can be displayed in a new Tab-page.

Comment 1

[:Gijs (he/him)]

Not a bug that needs to stay security-sensitive.

Comment 2

[Marcela (Please NI request to Brindusa Tot)]

This sounds like an enhancement, I will set a component to have a starting point for this. If this is not the right component please feel free to route this ticket to the corresponding team, thanks!

Comment 3

[Marcela (Please NI request to Brindusa Tot)]

I will move this enhancement to General for now. If this is not the right component please feel free to route this ticket to the corresponding team, thanks!

Comment 4

[Alfredo]

This is a very important improvement. Firefox lags behind other browsers (brave, opera) in this area https://privacytests.org/. Mozilla should be like Librewolf in this respect. Also, with the default settings, brave is a mile ahead of firefox.
We know that google, an advertising company, is a major source of income for mozilla, however mozilla should at least implement the feature and leave it disabled by default. Otherwise what is written in mozilla's manifesto (open free web) will remain just an unrealised good intention.

Comment 6

[08xjcec48]

Third-party Ad-blockers from Mozilla Add-ons doesn't block ads effectively

Note that the most powerful adblockers, uBlock Origin and AdGuard, can block ads effectively on the great majority of websites. If you're still getting ads with the adblocker you choose to use, report them to the people who maintain their filters:

• uBlock Origin - Report ads
• AdGuard - Report ads

uBlock Origin has GUIs to block scripts on a per-site or per-domain basis too:

• No scripting
• Medium mode

The original title of this issue also mentioned cookies. Firefox isolates third-party cookies by default, so you don't need to worry about them. If you want to delete certain cookies automatically when you close Firefox, open the Page Info window and change Set cookies to Allow for session.

Comment 7

[Alfredo]

You are right, especially ublock origin is a very good adblocker, however it is not integrated as this bug/feature request. Can someone explain why Mozilla refuses to add an adblocker in 2025? If users don't want it, they can disable it in the settings. Why have been steps made in recent years in favor of tracking instead of user privacy?
Thank you

Comment 8

[08xjcec48]

The Mozilla developers who have seen this request haven't closed it, so they aren't completely against the idea. Please refer to the Bugzilla Etiquette.

If you want feature requests to have a higher priority, you can support them on Mozilla Connect: Firefox built-in Adblocker.