I use linux — specifically MX Linux v25.2 — but I suspect this also pertains to Windows; I know nothing about Apple.
As noted in other comments about Brave’s support for certain Manifest V2 extensions, Brave currently “hosts” 4 Manifest V2 extensions:
brave://settings/extensions/v2
On that page in my instances of Brave (v1.92.134), I’ve checked the boxes for NoScript and uBlock Origin.
Installed extensions can be viewed here:
brave://extensions/
Viewing my installed extensions today (4 Jul 2026), I found a few items of interest. Relevant to this topic, there are 2 instances of NoScript. One is v13.6.20; the other is v11.4.44. There’s also an instance of uBlock Origin v1.72.0 Below both NoScript v11.4.44 and uBlock Origin is the text: “Brave-hosted”.
I don’t frequently view this page but a few websites I visit have recently been misbehaving in new and different ways. Part of my trouble-shooting led me down this path.
What I did on Brave’s “installed extensions” page: disable (but NOT remove) the non-Brave-hosted instance of NoScript. Websites that were misbehaving are now accessible.
Two comments about both NoScript and uBlock Origin: with each of these extensions, users can export personalized settings from one instance and import these settings to another instance. This can be done between instances of these extensions on Firefox and Chromium-based browsers. I haven’t yet added my personalized settings to the “Brave-hosted” instances of NoScript v11.4.44 and uBlock Origin. And second, although I toggled NoScript v13.6.20 (NOT “Brave-hosted”) OFF, I haven’t removed it. I’m taking this one step at a time.
Bottom line for folks using one or more of the 4 Brave-supported Manifest V2 extensions: check to see if perhaps there’s a conflicting NOT-“Brave-hosted” version installed. If “yes”, I suggest toggling the NOT-“Brave-hosted” instance(s) OFF.