It exists that selecting text caused Firefox to crash in some
circumstances. An attacker could potentially exploit this to cause a
denial of service. (CVE-2022-28287)
Mozilla Foundation Security Advisory 2022-13
Security Vulnerabilities fixed in Firefox 99
Announced
April 5, 2022
Impact
high
Products
Firefox
Fixed in
Firefox 99
...
Mozilla developers and community members Randell Jesup, Sebastian Hengst, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 98 Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code ...