Merge pull request mozilla#17021 from timvandermeij/fix-intermittent-…

…autoprint

Fix integration test "Interaction in autoprint.pdf must check if printing is triggered when the document is open"

test/integration/scripting_spec.js

@@ -1793,13 +1793,7 @@ describe("Interaction", () => {
     it("must check if printing is triggered when the document is open", async () => {
       await Promise.all(
         pages.map(async ([browserName, page]) => {
-          await page.waitForFunction(
-            "window.PDFViewerApplication.scriptingReady === true"
-          );
-
-          await page.waitForFunction(
-            `document.querySelector(".printedPage") !== null`
-          );
+          await page.waitForSelector(".printedPage");
           await page.keyboard.press("Escape");
         })
       );