Although many ad-blockers have migrated to Manifest V3 versions, these are generally less capable of detecting and blocking promoted targeted content.
Although Microsoft Edge, Mozilla Firefox, and Apple Safari have all adopted MV3, they have done so with their own implementation modifications, allowing users greater freedom while still benefiting from the security enhancements.
Still, support for MV2 is the only way to go for older add-ons, and Firefox reiterated via an announcement today that it will continue to support it in the foreseeable future.
"While some browsers are phasing out Manifest V2 entirely, Firefox is keeping it alongside Manifest V3," said Mozilla.
Glad to hear Firefox is doing the dual-support thing.
From the article ...
Glad to hear Firefox is doing the dual-support thing.
Firefox made a big mistake of breaking ad-on compatibility in the past. Let’s not make that mistake again.
RIP Autohide. Never used full screen again after Firefox version 4.