how to change freebsd firefox user agent to linux firefox

open tab with configs: about:config

add string: general.useragent.override

with value: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0

test: http:_maps.google.com/

click the lightning icon that appears in the bottom right corner of page, near the legend and tool icons. if it says the browser is operating in lite mode, it should also offer the option to change to the full mode.

note:

also check the following configuration settings in about:config. the following settings are currently working on google maps in freebsd 11:

| general.useragent.site_specific_overrides | true | | general.useragent.compatMode.firefox | true | | dom.push.userAgentID | unset |