As a developer I really like to know which version of a browser a user is running to be able to reproduce a specific bug. It does matter if they are using a fiv

As a developer I really like to know which version of a browser a user is running to be able to reproduce a specific bug. It does matter if they are using a five year old browser or the latest evergreen update of Firefox. Having the version number available somewhere (Help » About …) facilitates communication a lot. Also, for corporate customers it is sensible to agree on the version range supported for a web browser if you are offering a SaaS solution, especially if security matters.