Notes on Firefox Configuration

Basic configuration and default behaviour control for Firefox browser.

Extensions

uBlock Origin
Violentmonkey
Stylus

Advanced Preferences

The Configuration Editor (about:config page) lists Firefox settings known as preferences that are read from the prefs.js and user.js files in the Firefox profile and from application defaults. ¹

Fonts

Set CJK Fonts.

Name	Value
font.name.monospace.ja	Sarasa Mono J
font.name.monospace.ko	Sarasa Mono K
font.name.monospace.zh-CN	Sarasa Mono SC
font.name.monospace.zh-HK	Sarasa Mono HC
font.name.monospace.zh-TW	Sarasa Mono TC
font.name.sans-serif.ja	Sarasa Gothic J
font.name.sans-serif.ko	Sarasa Gothic K
font.name.sans-serif.zh-CN	Sarasa Gothic SC
font.name.sans-serif.zh-HK	Sarasa Gothic HC
font.name.sans-serif.zh-TW	Sarasa Gothic TC
font.name.serif.ja	Sarasa Gothic J
font.name.serif.ko	Sarasa Gothic K
font.name.serif.zh-CN	Sarasa Gothic SC
font.name.serif.zh-HK	Sarasa Gothic HC
font.name.serif.zh-TW	Sarasa Gothic TC

Privacy & Security

Name	Value
privacy.donottrackheader.enabled	true
signon.rememberSignons	false
extensions.formautofill.addresses.enabled	false
extensions.formautofill.creditCards.enabled	false
security.dialog_enable_delay	0

Policies

To implement this policy support, a policies.json file needs to be created. This file goes into a directory called distribution within the Firefox installation directory. ²

My policies.json:

{
    "policies": {
        "AppAutoUpdate": false,
        "BackgroundAppUpdate": false,
        "DisableAppUpdate": true,
        "DisableDefaultBrowserAgent": true,
        "DisablePocket": true,
        "DisableSetDesktopBackground": true,
        "DisableTelemetry": true,
        "DontCheckDefaultBrowser": true,
        "Extensions": {
            "Uninstall": [
                "[email protected]"
            ]
        },
        "ManualAppUpdateOnly": true,
        "Preferences": {
            "browser.region.update.enabled": {
                "Value": false,
                "Status": "locked"
            },
            "browser.search.region": {
                "Value": "US",
                "Status": "locked"
            }
        }
    }
}

Automatic updates and checks are disabled, because my firefox is managed via Scoop.
Localization services are locked in the US for avoiding garbage sponsored content (Weibo, Zhihu, etc.) or I don’t needs (Amazon.cn search engine).

The latest information about policies is available in the README on this GitHub repository.