Firefox, but so square.
Download file to
AppData\Roaming\Mozilla\Firefox\Profiles\<your profile name>\chrome
You need to create chrome folder manually.
Open about:config in Firefox set this to true
toolkit.legacyUserProfileCustomizations.stylesheets
For people don't want those rounded rectangle design styles.
Removes any border-radius properties on Firefox UI by using userChrome.css,
and an extra userContent.css to remove the same property all over the web.
