Inbuilt Whatsapp

[Keygamer]

I saw already in Opera that this is possible but would love to see this in my favourite browser!

[Jon]

Thanks for submitting an idea to the Mozilla Connect community! Your idea is now open to votes (aka kudos) and comments.

[Reitei17]

just go to the extension. find whatsapp sidebar and there also telegram sidebar. works the same as in opera.

[LonelyDuck]

Firefox will not embed Facebook's proprietary software into their browser. This goes against their core philosophy and is incompatible with privacy. Messenger apps have web versions for this purpose.