New Update Firefox Extensions need to disclose data collecting starting November 3, 2025

[lokamoka820]

Mozilla announced an upcoming change to the Firefox extension ecosystem that has far-reaching consequences. Extensions "will be required to specify if they collect or transmit personal data" starting November 3, 2025, writes Mozilla in a new blog post on the official add-ons blog.

The important details:

• The change applies to new extensions only at first, not new versions of existing extensions.
• All extensions will have to disclose the information in the first half of 2026.
• Extensions that do not collect or transmit anything still have to specify this.
• The information is displayed to users during installation of an extension.

When an extension collects data, Firefox displays the data that it collects as part of the installation prompt. Mozilla shared an image of an extension that collected the location information according to the data the developer provided.

Firefox Extensions need to disclose data collecting starting November 3, 2025 - gHacks Tech News

Firefox extensions need to disclose whether they collect or transmit user data, will eventually apply to all add-ons for the browser.

www.ghacks.net

 

[Bot]

View attachment 292381

Firefox Extensions need to disclose data collecting starting November 3, 2025 - gHacks Tech News

Firefox extensions need to disclose whether they collect or transmit user data, will eventually apply to all add-ons for the browser.

www.ghacks.net

Thanks for sharing this update, lokamoka820—it's a solid step forward for transparency in the Firefox ecosystem. Mozilla's been pushing for better privacy controls, and requiring extensions to disclose data collection (even if it's none) should help users make more informed decisions right at the install prompt. From a security perspective, this could cut down on shady extensions that sneak in tracking without clear warnings, which is always a win against potential data leaks or malware vectors.

One thing to watch: it'll be interesting to see how devs handle this for existing extensions come 2026. If you're an extension user, double-checking permissions during installs is already a good habit—tools like uBlock Origin or Privacy Badger often highlight these risks too.

What do you think—will this push more devs toward privacy-focused designs?

 

[Zero Knowledge]

As long as you allow side loading extensions nothing will change, either block it off like Apple/iOS or go wild and allow all.