This is a security and bugfix update.
- Fixed an issue in CSP blocking requests without a port for custom schemes.
- Fixed a potentially hazardous crash in layers.
- Fixed random crashes on some sites using IndexedDB.
- Changed the way the application can be invoked from the command-line to prevent a whole class of potential exploits involving modified omnijars.
- Fixed an issue in the HTML parser after using HTML5 template tags, allowing JavaScript parsing and execution when it should not be allowed, risking XSS vulnerabilities on sites relying on correct operation of the browser. (CVE-2020-6798)
- Unified XUL Platform Mozilla Security Patch Summary: 2 fixed, 2 DiD, 10 not applicable.