Cu.import("resource:///modules/AboutNewTab.jsm");
 let newTabURL = "file:///home/vallode/Documents/test/index.html";
 AboutNewTab.newTabURL = newTabURL;

Hi everyone, I am having trouble getting my custom new tab page to be focused when opened (instead of the address bar). I am currently using the `autoconfig.js` + `mozilla.cfg` approach to overriding the `AboutNewTab.jsm` service with a custom local file. This is working great with the two files containing this code: autoconfig.js: ``` pref("general.config.filename", "mozilla.cfg"); pref("general.config.obscure_value", 0); ``` mozilla.cfg: ``` // Custom firefox config let { classes:Cc, interfaces:Ci, utils:Cu } = Components; try { Cu.import("resource:///modules/AboutNewTab.jsm"); let newTabURL = "file:///home/vallode/Documents/test/index.html"; AboutNewTab.newTabURL = newTabURL; } catch(e) { Cu.reportError(e); } ``` I have been attempting to use the `gBrowser` global to add an event listener to the new tab opening, but with no success. Could anyone point me in the right direction for something like this?

   // Auto focus new tab content
   try {
     Cu.import("resource://gre/modules/Services.jsm");
     Cu.import("resource:///modules/BrowserWindowTracker.jsm");
   
     Services.obs.addObserver((event) => {
       window = BrowserWindowTracker.getTopWindow();
       window.gBrowser.selectedBrowser.focus();
     }, "browser-open-newtab-start");
   } catch(e) { Cu.reportError(e); }