You can install uBlock Origin Lite [1], and get literally the same blocklists but with better security properties.
[1]: https://chromewebstore.google.com/detail/ublock-origin-lite/...
[1]: https://chromewebstore.google.com/detail/ublock-origin-lite/...
> Injecting content scripts in a non-declarative way is unreliable in MV3 due to fact that extensions are really service workers which can be suspended at any time.
[1]: https://github.com/uBlockOrigin/uBOL-home/wiki/Frequently-as...
[2]: https://github.com/uBlockOrigin/uBOL-home/wiki/Frequently-as...