1. There is no web version of Signal (unlike e.g. Whatsapp or Telegram or Element)
2. Signal doesn't allow third-party clients (unlike e.g. Telegram or Element) so Opera can't even try to do it themselves.

it too has a web client

@SilentHugOfDoom said in Signal messenger:

it too has a web client

it doesn't not exist and probably wont. They explained it many times

"The fundamental problem with web interfaces is: there's no way to version, sign and securely distribute a web page. Instead, you're re-requesting the code you'll run every single time you visit the site (making audits practically impossible).

This effectively reduces the security of your end-to-end encrypted communication to that of your SSL connection to the server, i.e. you're only as secure as the CA system. Anyone able to intercept the client-server SSL connection (and the server itself) can silently change the code you receive and execute, with a very low risk of getting caught. This is why products which offer end-to-end encrypted communication through in-browser crypto are often considered snake oil, unless they use some form of a packaged & signed browser extension."

since it too has a web client

where?

Signal should be the messenger of choice for any security and privacy concerned user trying to avoid data monopolists, which is a strong match with the Opera user base.