# [SECTION 0100]: STARTUP
{
  /* 0101: disable default browser check
   * [SETTING] General>Startup>Always check if Firefox is your default browser ***/
  "browser.shell.checkDefaultBrowser" = false;
  /* 0102: set startup page [SETUP-CHROME]
   * 0=blank, 1=home, 2=last visited page, 3=resume previous session
   * [NOTE] Session Restore is not used in PB mode (0110) and is cleared with history (2803, 2804)
   * [SETTING] General>Startup>Restore previous session ***/
  "browser.startup.page" = 0;
  /* 0103: set HOME+NEWWINDOW page
   * about:home=Activity Stream (default, see 0105), custom URL, about:blank
   * [SETTING] Home>New Windows and Tabs>Homepage and new windows ***/
  "browser.startup.homepage" = "about:blank";
  /* 0104: set NEWTAB page
   * true=Activity Stream (default, see 0105), false=blank page
   * [SETTING] Home>New Windows and Tabs>New tabs ***/
  "browser.newtabpage.enabled" = false;
  "browser.newtab.preload" = false;
  /* 0105: disable Activity Stream stuff (AS)
   * AS is the default homepage/newtab in FF57+, based on metadata and browsing behavior.
   *    **NOT LISTING ALL OF THESE: USE THE PREFERENCES UI**
   * [SETTING] Home>Firefox Home Content>...  to show/hide what you want ***/
  /* 0105a: disable Activity Stream telemetry ***/
  "browser.newtabpage.activity-stream.feeds.telemetry" = false;
  "browser.newtabpage.activity-stream.telemetry" = false;
  /* 0105b: disable Activity Stream Snippets
   * Runs code received from a server (aka Remote Code Execution) and sends information back to a metrics server
   * [1] https://abouthome-snippets-service.readthedocs.io/ ***/
  "browser.newtabpage.activity-stream.feeds.snippets" = false;  # [DEFAULT: false FF89+]
  /* 0105c: disable Activity Stream Top Stories, Pocket-based and/or sponsored content ***/
  "browser.newtabpage.activity-stream.feeds.section.topstories" = false;
  "browser.newtabpage.activity-stream.section.highlights.includePocket" = false;
  "browser.newtabpage.activity-stream.showSponsored" = false;
  "browser.newtabpage.activity-stream.feeds.discoverystreamfeed" = false;  # [FF66+]
  "browser.newtabpage.activity-stream.showSponsoredTopSites" = false;      # [FF83+]
  /* 0105e: clear default topsites
   * [NOTE] This does not block you from adding your own ***/
  "browser.newtabpage.activity-stream.default.sites" = "";
  /* 0110: start Firefox in PB (Private Browsing) mode
   * [NOTE] In this mode *all* windows are "private windows" and the PB mode icon is not displayed
   * [WARNING] The P in PB mode is misleading: it means no "persistent" disk storage such as history,
   * caches, searches, cookies, localStorage, IndexedDB etc (which you can achieve in normal mode).
   * In fact, PB mode limits or removes the ability to control some of these, and you need to quit
   * Firefox to clear them. PB is best used as a one off window (File>New Private Window) to provide
   * a temporary self-contained new session. Close all Private Windows to clear the PB mode session.
   * [SETTING] Privacy & Security>History>Custom Settings>Always use private browsing mode
   * [1] https://wiki.mozilla.org/Private_Browsing
   * [2] https://spreadprivacy.com/is-private-browsing-really-private/ ***/
   "browser.privatebrowsing.autostart" = true;
 }