Hello
Is it possible in openfire, instead of using mobile applications such as Conversations or monocles chat, clients can connect to the openfire server from within Android or Windows from the Firefox or Google Chrome browser and can make text messages or voice calls?
I’m not exactly sure what you’re asking. Openfire does not really know if the client is running on a mobile phone or on a desktop computer. If one client can use a particular feature with Openfire, then it is very likely that other clients can also make use of that feature. It is up to the client to provide the implementation of that feature: every client offers different features.
thanks for your answer
I mean, is it possible to use openfire like synapse matrix so that clients can connect through the web?
Like the pictures below

Ah, yes.
We have our own Pàdé client, that is installed as a browser extension: Ignite Realtime: Pade
You can also use any other third-party XMPP client with Openfire. There are many different clients, some of which are browser-based. To make installation easier, we have created an Openfire plugin for a couple of these web-based clients:
- Ignite Realtime: Openfire inverse Plugin Archive
- Ignite Realtime: Openfire jsxc Plugin Archive
- Ignite Realtime: Openfire candy Plugin Archive
The XMPP Standards Foundation maintains a listing of XMPP software on their website. You might be able to find other clients there: XMPP | XMPP Software
thanks for your answer