Simple script and output for converting user prefs to json

ateam_prefs_general.json

{
  "browser.console.showInPanel": true,
  "browser.dom.window.dump.enabled": true,
  "browser.firstrun.show.localepicker": false,
  "browser.firstrun.show.uidiscovery": false,
  "browser.startup.page": 0,
  "browser.search.suggest.timeout": 10000,
  "browser.ui.layout.tablet": 0,
  "dom.allow_scripts_to_close_windows": true,
  "dom.disable_open_during_load": false,
  "dom.experimental_forms": true,
  "dom.forms.number": true,
  "dom.forms.color": true,
  "dom.forms.datetime": true,
  "dom.max_script_run_time": 0,
  "hangmonitor.timeout": 0,
  "dom.max_chrome_script_run_time": 0,
  "dom.ipc.reportProcessHangs": false,
  "dom.popup_maximum": -1,
  "dom.send_after_paint_to_content": true,
  "dom.successive_dialog_time_limit": 0,
  "signed.applets.codebase_principal_support": true,
  "browser.shell.checkDefaultBrowser": false,
  "shell.checkDefaultClient": false,
  "browser.warnOnQuit": false,
  "accessibility.typeaheadfind.autostart": false,
  "findbar.highlightAll": false,
  "findbar.modalHighlight": false,
  "javascript.options.showInConsole": true,
  "devtools.browsertoolbox.panel": "jsdebugger",
  "devtools.debugger.remote-port": 6023,
  "devtools.devedition.promo.enabled": false,
  "browser.EULA.override": true,
  "gfx.color_management.force_srgb": true,
  "gfx.logging.level": 1,
  "network.manage-offline-status": false,
  "network.http.speculative-parallel-limit": 0,
  "dom.min_background_timeout_value": 1000,
  "test.mousescroll": true,
  "security.default_personal_cert": "Select Automatically",
  "network.http.prompt-temp-redirect": false,
  "media.preload.default": 2,
  "media.preload.auto": 3,
  "media.cache_size": 1000,
  "media.volume_scale": "0.01",
  "media.test.dumpDebugInfo": true,
  "media.dormant-on-pause-timeout-ms": 0,
  "security.warn_viewing_mixed": false,
  "app.update.enabled": false,
  "app.update.staging.enabled": false,
  "app.update.url.android": "",
  "media.gmp-manager.url.override": "http://%(server)s/dummy-gmp-manager.xml",
  "media.gmp-manager.updateEnabled": false,
  "dom.w3c_touch_events.enabled": 1,
  "layout.accessiblecaret.enabled_on_touch": false,
  "dom.webcomponents.enabled": true,
  "dom.webcomponents.customelements.enabled": true,
  "dom.htmlimports.enabled": true,
  "font.size.inflation.emPerLine": 0,
  "font.size.inflation.minTwips": 0,
  "experiments.supported": true,
  "experiments.manifest.uri": "http://%(server)s/experiments-dummy/manifest",
  "browser.tabs.disableBackgroundZombification": true,
  "extensions.enabledScopes": 5,
  "extensions.autoDisableScopes": 0,
  "extensions.getAddons.cache.enabled": false,
  "extensions.installDistroAddons": false,
  "extensions.defaultProviders.enabled": true,
  "xpinstall.signatures.required": false,
  "geo.wifi.uri": "http://%(server)s/tests/dom/tests/mochitest/geolocation/network_geolocation.sjs",
  "geo.wifi.timeToWaitBeforeSending": 2000,
  "geo.wifi.scan": false,
  "geo.wifi.logging.enabled": true,
  "dom.push.connection.enabled": false,
  "urlclassifier.updateinterval": 172800,
  "browser.safebrowsing.downloads.remote.url": "http://%(server)s/safebrowsing-dummy/update",
  "browser.safebrowsing.provider.google.gethashURL": "http://%(server)s/safebrowsing-dummy/gethash",
  "browser.safebrowsing.provider.google.updateURL": "http://%(server)s/safebrowsing-dummy/update",
  "browser.safebrowsing.provider.mozilla.gethashURL": "http://%(server)s/safebrowsing-dummy/gethash",
  "browser.safebrowsing.provider.mozilla.updateURL": "http://%(server)s/safebrowsing-dummy/update",
  "privacy.trackingprotection.introURL": "http://%(server)s/trackingprotection/tour",
  "extensions.update.url": "http://%(server)s/extensions-dummy/updateURL",
  "extensions.update.background.url": "http://%(server)s/extensions-dummy/updateBackgroundURL",
  "extensions.blocklist.detailsURL": "http://%(server)s/extensions-dummy/blocklistDetailsURL",
  "extensions.blocklist.itemURL": "http://%(server)s/extensions-dummy/blocklistItemURL",
  "extensions.blocklist.url": "http://%(server)s/extensions-dummy/blocklistURL",
  "extensions.hotfix.url": "http://%(server)s/extensions-dummy/hotfixURL",
  "extensions.systemAddon.update.url": "http://%(server)s/dummy-system-addons.xml",
  "extensions.update.enabled": false,
  "extensions.webservice.discoverURL": "http://%(server)s/extensions-dummy/discoveryURL",
  "extensions.getAddons.maxResults": 0,
  "extensions.getAddons.get.url": "http://%(server)s/extensions-dummy/repositoryGetURL",
  "extensions.getAddons.getWithPerformance.url": "http://%(server)s/extensions-dummy/repositoryGetWithPerformanceURL",
  "extensions.getAddons.search.browseURL": "http://%(server)s/extensions-dummy/repositoryBrowseURL",
  "extensions.getAddons.search.url": "http://%(server)s/extensions-dummy/repositorySearchURL",
  "services.settings.server": "http://%(server)s/dummy-kinto/v1",
  "network.sntp.pools": "%(server)s",
  "network.sntp.maxRetryCount": 1,
  "app.support.baseURL": "http://%(server)s/support-dummy/",
  "security.notification_enable_delay": 0,
  "security.turn_off_all_security_so_that_viruses_can_take_over_this_computer": true,
  "dom.use_xbl_scopes_for_remote_xul": true,
  "captivedetect.canonicalURL": "http://%(server)s/captive-detect/success.txt",
  "network.activity.blipIntervalMilliseconds": 250,
  "datareporting.policy.dataSubmissionPolicyBypassNotification": true,
  "datareporting.healthreport.documentServerURI": "http://%(server)s/healthreport/",
  "datareporting.healthreport.about.reportUrl": "http://%(server)s/abouthealthreport/v4/",
  "layout.css.report_errors": true,
  "layout.css.grid-template-subgrid-value.enabled": true,
  "layout.css.contain.enabled": true,
  "layout.css.initial-letter.enabled": true,
  "layout.css.object-fit-and-position.enabled": true,
  "layout.css.prefixes.webkit": true,
  "layout.css.prefixes.device-pixel-ratio-webkit": true,
  "layout.css.shape-outside.enabled": true,
  "layout.spammy_warnings.enabled": false,
  "media.mediasource.mp4.enabled": true,
  "media.mediasource.webm.enabled": true,
  "dom.mozContacts.enabled": true,
  "dom.mozSettings.enabled": true,
  "network.http.bypass-cachelock-threshold": 200000,
  "dom.gamepad.enabled": true,
  "dom.gamepad.non_standard_events.enabled": true,
  "geo.provider.testing": true,
  "browser.pagethumbnails.capturing_disabled": true,
  "browser.download.panel.shown": true,
  "browser.newtabpage.introShown": true,
  "browser.webapps.testing": true,
  "browser.snippets.enabled": false,
  "browser.snippets.syncPromo.enabled": false,
  "browser.snippets.firstrunHomepage.enabled": false,
  "general.useragent.updates.enabled": false,
  "browser.webapps.checkForUpdates": 0,
  "dom.presentation.testing.simulate-receiver": false,
  "browser.contentHandlers.types.0.uri": "http://test1.example.org/rss?url=%%s",
  "browser.contentHandlers.types.1.uri": "http://test1.example.org/rss?url=%%s",
  "browser.contentHandlers.types.2.uri": "http://test1.example.org/rss?url=%%s",
  "browser.contentHandlers.types.3.uri": "http://test1.example.org/rss?url=%%s",
  "browser.contentHandlers.types.4.uri": "http://test1.example.org/rss?url=%%s",
  "browser.contentHandlers.types.5.uri": "http://test1.example.org/rss?url=%%s",
  "toolkit.telemetry.server": "https://%(server)s/telemetry-dummy/",
  "toolkit.telemetry.test.pref1": true,
  "toolkit.telemetry.test.pref2": false,
  "identity.fxaccounts.auth.uri": "https://%(server)s/fxa-dummy/",
  "identity.fxaccounts.remote.signup.uri": "https://%(server)s/fxa-signup",
  "identity.fxaccounts.remote.force_auth.uri": "https://%(server)s/fxa-force-auth",
  "identity.fxaccounts.remote.signin.uri": "https://%(server)s/fxa-signin",
  "identity.fxaccounts.settings.uri": "https://%(server)s/fxa-settings",
  "identity.fxaccounts.remote.webchannel.uri": "https://%(server)s/",
  "identity.fxaccounts.skipDeviceRegistration": true,
  "apz.content_response_timeout": 60000,
  "security.ssl.errorReporting.url": "https://example.com/browser/browser/base/content/test/general/ssl_error_reports.sjs?succeed",
  "browser.translation.bing.authURL": "http://%(server)s/browser/browser/components/translation/test/bing.sjs",
  "browser.translation.bing.translateArrayURL": "http://%(server)s/browser/browser/components/translation/test/bing.sjs",
  "browser.translation.yandex.translateURLOverride": "http://%(server)s/browser/browser/components/translation/test/yandex.sjs",
  "browser.translation.engine": "bing",
  "browser.aboutHomeSnippets.updateUrl": "nonexistent://test",
  "browser.newtabpage.directory.source": "data:application/json,{\"testing\":1}",
  "browser.newtabpage.directory.ping": "",
  "browser.uitour.pinnedTabUrl": "http://%(server)s/uitour-dummy/pinnedTab",
  "browser.uitour.url": "http://%(server)s/uitour-dummy/tour",
  "browser.search.isUS": true,
  "browser.search.countryCode": "US",
  "browser.search.geoSpecificDefaults": false,
  "browser.selfsupport.url": "https://%(server)s/selfsupport-dummy/",
  "extensions.shield-recipe-client.api_url": "https://%(server)s/selfsupport-dummy/",
  "media.eme.enabled": true,
  "media.autoplay.enabled": true,
  "browser.tabs.remote.autostart.1": false,
  "browser.tabs.remote.autostart.2": false,
  "browser.tabs.delayHidingAudioPlayingIconMS": 0,
  "dom.ipc.tabs.shutdownTimeoutSecs": 0,
  "extensions.e10sBlocksEnabling": false,
  "browser.reader.detectedFirstArticle": true,
  "lightweightThemes.selectedThemeID": "",
  "media.webspeech.synth.test": true,
  "browser.urlbar.suggest.searches": false,
  "browser.urlbar.userMadeSearchSuggestionsChoice": true,
  "dom.audiochannel.mutedByDefault": false,
  "webextensions.tests": true,
  "startup.homepage_welcome_url": "about:blank",
  "startup.homepage_welcome_url.additional": "",
  "plugin.load_flash_only": false,
  "media.libavcodec.allow-obsolete": true,
  "media.openUnsupportedTypeWithExternalApp": false,
  "signon.rememberSignons": false
}

userPrefsToJson.js

#!/usr/bin/env node

/* invocation:

$ curl https://hg.mozilla.org/mozilla-central/raw-file/143bb4b9249e528e658f6ccc449991794b8675f8/testing/profiles/prefs_general.js -O > prefs_general.js
$ node userPrefsToJson.js ./prefs_general.js  >  ateam_prefs_general.json

Note: the argument must be given as a `require`-able path, thus the `./thefilename`

*/

var args = process.argv.slice(2);

var out = {};
function user_pref(k,v) {
  out[k] = v;
}
global.user_pref = user_pref;

require(args[0]);  // execute the js. Will write to our array instead.
console.log(JSON.stringify(out,null,2));  // prints the json nicely