Firefox Sync 'send tab

[basbebe]

I'm on FF 89.0b10

I was using Firefox Sync and used the 'send tab' feature to send tabs from one browser (linke mobile) to another.

When I use this user.js, my desktop FF won't receive new tabs until I hit 'synchronize' from the FF Sync menu manually.
Before, it received them automagically.

This is my user-overrides.js:

/*** MY OVERRIDES ***/

user_pref("_user.js.parrot", "overrides section syntax error");
/* own [SETUP] ***/

/* 0412: disable SB checks for downloads (remote) ***/
// user_pref("browser.safebrowsing.downloads.remote.enabled", true);
// user_pref("browser.safebrowsing.downloads.remote.url", "https://sb-ssl.google.com/safebrowsing/clientreport/download?key=%GOOGLE_SAFEBROWSING_API_KEY%");

/* 4504: enable RFP letterboxing [FF67+] ***/
user_pref("privacy.resistFingerprinting.letterboxing", false); // [HIDDEN PREF]
   // user_pref("privacy.resistFingerprinting.letterboxing.dimensions", ""); // [HIDDEN PREF]

/* 0801: disable location bar using search ***/
user_pref("keyword.enabled", true);

/* 1001: disable disk cache ***/
user_pref("browser.cache.disk.enable", true);

/* 1241: disable insecure passive content (such as images) on https pages [SETUP-WEB] ***/
user_pref("security.mixed_content.block_display_content", false);

/* 2010: disable WebGL (Web Graphics Library) ***/
user_pref("webgl.disabled", false);
user_pref("webgl.enable-webgl2", true);

/* arkenfox recipes ***/
/* see https://github.com/arkenfox/user.js/issues/1080 */

/* override recipe: enable DRM and let me watch videos ***/
   // user_pref("media.gmp-widevinecdm.enabled", true); // 1825 default commented out in user.js v86+
user_pref("media.eme.enabled", true); // 1830

/* override recipe: enable session restore ***/
user_pref("browser.startup.page", 3); // 0102
  // user_pref("browser.privatebrowsing.autostart", false); // 0110 required if you had it set as true
  // user_pref("places.history.enabled", true); // 0862 required if you had it set as false
  user_pref("browser.sessionstore.privacy_level", 0); // 1021 optional [to restore extras like cookies/formdata]
user_pref("privacy.clearOnShutdown.history", false); // 2803
  user_pref("privacy.clearOnShutdown.cookies", false); // 2803 optional
  // user_pref("privacy.clearOnShutdown.formdata", false); // 2803 optional
user_pref("privacy.cpd.history", false); // 2804 to match when you use Ctrl-Shift-Del
  user_pref("privacy.cpd.cookies", false); // 2804 optional
  // user_pref("privacy.cpd.formdata", false); // 2804 optional

/* override recipe: FF87+ use ETP Strict mode ***/
user_pref("privacy.firstparty.isolate", false); // 4001
user_pref("network.cookie.cookieBehavior", 5); // 2701
user_pref("browser.contentblocking.category", "strict"); // 2701
  // user_pref("privacy.trackingprotection.enabled", true); // 2710 user.js default
  // user_pref("privacy.trackingprotection.socialtracking.enabled", true); // 2711 user.js default

/* override recipe: enable web conferencing: Google Meet | JitsiMeet | BigBlueButton | Zoom | Discord ***/
// IMPORTANT: uncheck "Prevent WebRTC from leaking local IP addresses" in uBlock Origin's settings
// NOTE: if using RFP (4501)
   // some sites, e.g. Zoom, need a canvas site exception [Right Click>View Page Info>Permissions]
   // Discord video does not work: it thinks you are FF78: use a separate profile or spoof the user agent
user_pref("media.peerconnection.enabled", true); // 2001
user_pref("media.peerconnection.ice.no_host", false); // 2001 [may or may not be required]
   // user_pref("webgl.disabled", false); // 2010 [required for Zoom]
   // user_pref("webgl.min_capability_mode", false); // 2012 [removed from the user.js in v88 - reset it]
   // user_pref("media.getusermedia.screensharing.enabled", true); // 2022 optional
   // user_pref("media.autoplay.blocking_policy", 0); // 2031 optional [otherwise add site exceptions]
   // user_pref("javascript.options.wasm", true); // 2422 optional [some platforms may require this]
user_pref("dom.webaudio.enabled", true); // 2510/* override recipe: remove page margin ***/

user_pref("_user.js.parrot", "overrides section successful");

[basbebe]

UPDATE

Nevermind: I forgot to safe before adding

/* 2302: disable service workers [FF32, FF44-compat] ***/
user_pref("dom.serviceWorkers.enabled", true);

/* 2304: disable Web Notifications ***/
user_pref("dom.push.enabled", true);

Now it works.