If `ConvenienceExceptions`is true, Firefox will apply exceptions automatically that are only required to fix minor issues and make convenience features available. (Firefox 145)
-Note: Users can change `BaselineExceptions` and `ConvenienceExceptions` even when `Category` is set to ```strict``` unless `Locked` is set to true.
+Note: Users can change `BaselineExceptions` and `ConvenienceExceptions` even when `Category` is set to ```strict``` unless `Locked` is set to true. If `Locked` is set to true, the defaults are used unless a different value is specified in policy for `BaselineExceptions` and `ConvenienceExceptions`.
**Compatibility:** Firefox 60, Firefox ESR 60 (Cryptomining and Fingerprinting added in 70/68.2, Exceptions added in 73/68.5. Category added in Firefox 142/140.2. BaselineExceptions and ConvenienceExceptions added in Firefox 145)\
**CCK2 Equivalent:** N/A\
#### Interaction Notes
- `"installation_mode": "blocked"` takes precedence over all other settings. When set, extensions cannot be installed regardless of `allowed_types` or `install_sources`. A configuration for a specific extension ID still overrides the `"*"` configuration.
- To block all extensions except a few, use `"installation_mode": "blocked"` for `"*"` and explicitly override it for allowed or force-installed extensions.
-- To block extensions but allow themes, dictionaries, and language packs, use `"allowed_types": ["theme", "dictionary", "locale"]` in the default (`"*"` ) configuration. (`"locale"` corresponds to Firefox language packs.)
+- To block extensions but allow themes, dictionaries, and language packs, leave the default (`"*"` ) `installation_mode` as `"allowed"` and set `"allowed_types": ["theme", "dictionary", "locale"]`. (`"locale"` corresponds to Firefox language packs.)
+ **Do not set `"installation_mode": "blocked"` in this scenario**, because `allowed_types` is ignored when installation is blocked.
**Compatibility:** Firefox 69, Firefox ESR 68.1 (As of Firefox 85, Firefox ESR 78.7, installing a theme makes it the default.)\
**CCK2 Equivalent:** N/A\