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firefox: add support for configuring extensions

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This commit refactors programs.firefox.profiles.<name>.extensions in
order to support both installation of extensions (addons) and their
configuration. It does this by setting the
`extensions.webextensions.ExtensionStorageIDB.enabled` user_pref to
false.

When this preference is set to false, support for storing extension
settings in sqlite databases, also known as IndexedDB or IDB, is
reverted back to the JSON format present in firefox versions prior to
version 63, as seen here:
https://blog.mozilla.org/addons/2018/08/03/new-backend-for-storage-local-api/

IndexedDB was made the default due to performance improvements, but had
the consequence of removing any possibility of declarative extension
configuration without the assistance of firefox's policy system. The
policy system is supported by a small amount of extensions, such as
uBlock Origin, but has to be explicitly supported. Even when supported,
it provides significantly less granular control when compared to the
JSON storage format.
This commit is contained in:
HPsaucii 2025-01-31 09:22:38 +00:00 • committed by Austin Horstman
parent 3a0cf8f1aa
commit 27ffa35178
4 changed files with 190 additions and 78 deletions
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31
tests/modules/programs/firefox/profiles/extensions/default.nix Normal file
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modulePath:
{ config, lib, pkgs, ... }:
with lib;
let
cfg = getAttrFromPath modulePath config;
firefoxMockOverlay = import ../../setup-firefox-mock-overlay.nix modulePath;
in {
imports = [ firefoxMockOverlay ];
config = mkIf config.test.enableBig (setAttrByPath modulePath {
enable = true;
profiles.extensions = {
extensions.settings."uBlock0@raymondhill.net".settings = {
selectedFilterLists = [
"ublock-filters"
"ublock-badware"
"ublock-privacy"
"ublock-unbreak"
"ublock-quick-fixes"
];
};
};
} // {
nmt.script = ''
assertFileContent \
home-files/${cfg.configPath}/extensions/uBlock0@raymondhill.net/storage.js \
${./expected-storage.js}
'';
});
}

1
tests/modules/programs/firefox/profiles/extensions/expected-storage.js Normal file
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@ -0,0 +1 @@
{"selectedFilterLists":["ublock-filters","ublock-badware","ublock-privacy","ublock-unbreak","ublock-quick-fixes"]}