Preferences that start with the following prefixes are supported:
```
accessibility.
+app.update.* (Firefox 86, Firefox 78.8)
browser.
datareporting.policy.
dom.
| If false, SSL errors cannot be sent to Mozilla.
| security.tls.hello_downgrade_check | boolean | true
| If false, the TLS 1.3 downgrade check is disabled.
+| security.tls.version.enable-deprecated | boolean | false
+| If true, browser will accept TLS 1.0. and TLS 1.1 (Firefox 86, Firefox 78.8)
| security.warn_submit_secure_to_insecure | boolean | true
| If false, no warning is shown when submitting s form from https to http.