Option to change User-Agent

[BlobCodes]

Is your feature request related to a problem? Please describe.
As wexond is a relatively unknown browser (and thus not a lot of people use it), it's User-Agent is very unique. This leads to users of the browser being very easily identifiable.
Websites like qwant.com even warn you because of that.
Also, the User-Agent seems to trigger the legacy Google sign-in page (#265 ).

Describe the solution you'd like
To be more private and to have a better overall experience, I think that an option to change the User-Agent could be really useful. Because wexond wants to be a privacy-focused web browser, changing the User-Agent to (for example) Chrome's by default to not get fingerprinted would be good.

Describe alternatives you've considered
Just changing the User-Agent to (for example) Chrome's without any option to change it would also do the trick and be easier to implement, but I think an option to change the User-Agent could also be useful in other ways, thus I wouldn't recommend this solution.

Additional context
My User-Agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Wexond/3.1.0 Chrome/76.0.3809.146 Electron/6.0.12 Safari/537.36)