Bug 1939658 - Replace new URL usage with URL.parse/URL.canParse where possible. r=robwu,Standard8,Gijs,mtigley,pdahiya,settings-reviewers,credential-management-reviewers,devtools-reviewers,tabbrowser-reviewers,places-reviewers,omc-reviewers,migration-reviewers,firefox-desktop-core-reviewers ,home-newtab-reviewers,webcompat-reviewers,urlbar-reviewers,twisniewski,mossop,dao,nchevobbe,webdriver-reviewers,whimboo,issammani,mconley,nbarrett,beth

Differential Revision: https://phabricator.services.mozilla.com/D233071

browser/base/content/browser-init.js

@@ -203,13 +203,11 @@ var gBrowserInit = {
     // Hack to ensure that the various initial pages favicon is loaded
     // instantaneously, to avoid flickering and improve perceived performance.
     this._callWithURIToLoad(uriToLoad => {
-      let url;
-      try {
-        url = Services.io.newURI(uriToLoad);
-      } catch (e) {
+      let url = URL.parse(uriToLoad);
+      if (!url) {
         return;
       }
-      let nonQuery = url.prePath + url.filePath;
+      let nonQuery = url.URI.prePath + url.pathname;
       if (nonQuery in gPageIcons) {
         gBrowser.setIcon(gBrowser.selectedTab, gPageIcons[nonQuery]);
       }