Bug 1813947 - Fix pdf location evaluation for feature callout in chrome r=aminomancer,omc-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D168327

browser/base/content/tabbrowser.js

@@ -6748,7 +6748,7 @@
             gBrowser.featureCallout &&
             (gBrowser.featureCalloutPanelId !==
               gBrowser.selectedTab.linkedPanel ||
-              gBrowser.featureCallout.source !== aLocation.spec)
+              !aLocation.spec.endsWith(".pdf"))
           ) {
             gBrowser.featureCallout._endTour(true);
             gBrowser.featureCallout = null;