Many customers probably have old mozilla.cfg files lying around on their machines (maybe even from using our packages), using the old configuration format.The package will migrate settings from the old config format to the new policies format, if necessary.However, if the old config file is obfuscated, we cannot read it, and it will be ignored a message will, of course, be logged in that case. The package will try to find the old mozilla.cfg, even if the customer has named it differently (such as I-refuse-to-conform-to-standards-because-I-am-a-special-snowflake.cfg).So if a package flag sets a setting to one thing, and any kind of config sets it to something else, the package flag is what will be set in the resulting file. To make that merge work, we had to set up a hierarchy that determines which option takes precedence over the others: optional parameters > included policies.json > included mozilla.cfg > old policies.json file > old mozilla.cfg file. Now, we will read the old config files, and merge it with any optional parameters, as well as the two new flags 'Include Policy File' and 'Include Config File', to create one fully functioning configuration. Previously, the package deleted the old config files to ensure that we had no overlaps with optional parameters.The package will no longer delete old config files and/or policies.json files (when we say config files from now, it will mean both mozilla.cfg and policies.json, else we will mention them specifically by name).This requires a so-called provider, which is unique to the customer, and a bunch of other stuff. However, a lot of the policies.json stuff requires configuration for instance, a customer may want Firefox to use DNS over HTTPS, rather than regular DNS queries. Some of the settings that come from the old config file (default name: mozilla.cfg) are now in the policies.json file (such as settings for automatic updates), and a bunch of new ones was added to policies.json as well. It is a JSON file, which contains a bunch of settings for Firefox.

It all started with the policies.json file, that Mozilla appears to be pushing on people now. Good news, everyone! The Mozilla Firefox packages are now far more amazing than ever before!

Mozilla firefox update 58