Pinned selenium version causes issues

[tanitna]

Selenium's version is pinned to selenium>=3.141.0,<3.142.0 which makes dependency resolution impossible if the most recent version (4.13.0 at the moment) is also required by another package. Given that this dependency is only required for tests and an experimental (and disabled by default) feature, it would be nice if it were optional to install it if and only if someone wants to run tests or do cookie scanning.