I am very sorry but I have no idea what you mean by AgentSamsung is usually based on an older version of Blink, hence why it may come up as unsupported sometimes. Haven't checked in a while too but are they also using their own user agent?
user agent is the string the browser sends to identify itself to a website, essentially "hi i'm samsung browser", then websites can use that to do different stuff depending on browser, used to be common when browsers behaved very differently and the developer wanted their website to work in all browsers, now the browsers are basically the same and the user agent is either used to hassle you to install another browser or for fingerprinting (indirectly identifying you).I am very sorry but I have no idea what you mean by Agent
thank you I'll give it a goI don't have the facebook app installed on my phone so any links or emails always take me to the website which works without any unsupported message. Are you forcing the desktop version?
Ah-ha! Forced the desktop site on my phone and am now also getting
'Unsupported browser
You're using a browser that isn't supported by Facebook. Update your browser to post comments'
Try changing the the mobile website, m.facebook.com or choose the mobile site option within settings.