XMPP is extensible and has features such as Ad-Hoc Commands (XEP-0050) and PubSub (XEP-0060) and other useful XEPs which allow to synchronize data.
An example case would be to synchronize Ladybird sessions with a personal XMPP account.
LadyBird at home and LadyBird at office and LadyBird in the vehicle are connected to a single XMPP account browser@ladybird.org and are synchronized all of the time.
Place
Jabber ID and Resource
Home
browser@ladybird.org/artix
Office
browser@ladybird.org/slackware
Tablet
browser@ladybird.org/postmarketos
Furthermore, XEP-0277 and XEP-0472 allow publishing of Atom syndication feeds (RFC 4287) content which means that by supporting RFC 4287, LadyBird will be able to easily read data of XEP-0277 and XEP-0472.
XMPP can also be used as a viable and safer replacement to webhooks.
These are a couple of examples of what XMPP can offer to HTML browsers.
Without commenting on the technical points of this issue, the correct capitalization is "Ladybird", as in "Ladybug" 🐞, not "LadyBird" as in female bird 🐦
Not for IM, though it can be used for this too.
XMPP is extensible and has features such as Ad-Hoc Commands (XEP-0050) and PubSub (XEP-0060) and other useful XEPs which allow to synchronize data.
An example case would be to synchronize Ladybird sessions with a personal XMPP account.
LadyBird at home and LadyBird at office and LadyBird in the vehicle are connected to a single XMPP account
browser@ladybird.org
and are synchronized all of the time.browser@ladybird.org/artix
browser@ladybird.org/slackware
browser@ladybird.org/postmarketos
Furthermore, XEP-0277 and XEP-0472 allow publishing of Atom syndication feeds (RFC 4287) content which means that by supporting RFC 4287, LadyBird will be able to easily read data of XEP-0277 and XEP-0472.
XMPP can also be used as a viable and safer replacement to webhooks.
These are a couple of examples of what XMPP can offer to HTML browsers.
There are many other options, other than IM.
Reference: Ladybird Browser and XMPP