Yes. Maybe something like this approach.
…or one can use a browser extension (eg. Stylus ),
that allows one to configure customer CSS per site/page
that is automatically applied only for the respective site/page.
WARNING - As always, do review the author/source of the browser extension and the permissions you allow it. Download browser-extensions only from trusted sources to stay safe/secure.
Also, you may want to experiment
modifying the values being assigned
(eg. 300px
→ 400px
or 20%
→ 25%
)
to match your display dimensions and personal preferences.