https://blog.chromium.org/2024/05/manifest-v2-phase-out-begins.html
In November 2023, we shared a timeline for the phasing out of Manifest V2 extensions in Chrome. Based on the progress and feedback we...
You should check out Ladybird browser, it's an impressive piece work, it's definitely no ready for everyday use, but it is proof that a small community can develop and maintain a project as complex and large as a browser.
It is probably the only browser in active development that is not being paid by Google, even Firefox gets most of its income from defaulting the search engine to Google