sounds like it’s not supposed to be a general use tool, but instead for counterintelligence only:

The Ministry of the Interior anticipates submitting around 30 requests per year for the surveillance of unencrypted messages and between 5 to 15 requests for encrypted communications. If there are 30 instances of encrypted message monitoring within a single calendar year, the Interior Minister is obligated to inform a permanent subcommittee of the National Council, which is the directly elected chamber of the Austrian Parliament.

Each surveillance method will require case-by-case approval from the Federal Administrative Court. The process involves a legal protection officer from the Ministry of the Interior, who will have three business days to respond to any request. Following that, a panel of three judges from the Federal Administrative Court will review the case. In urgent situations, an individual judge may grant approval, supported by a 24-hour judicial service system.

https://themunicheye.com/austrian-government-approves-malware-surveillance-23431

broad use would expose its existence and make any 0days useless in short order

firefox at minimum clears the very low bar of not exposing casual user to crypto