fix(firefox): fix reload with hash URLs

While this fixes the regression, this breaks the microsoft#20791.
We'll fix it separately.

Fixes microsoft#21145

packages/playwright-core/src/server/firefox/ffPage.ts

@@ -393,7 +393,7 @@ export class FFPage implements PageDelegate {
   }
 
   async reload(): Promise<void> {
-    await this._session.send('Page.reload');
+    await this._page._frameManager.mainFrame().softReload();
   }
 
   async goBack(): Promise<boolean> {

packages/playwright-core/src/server/frames.ts

@@ -1512,6 +1512,12 @@ export class Frame extends SdkObject {
     return context.evaluate(() => document.title);
   }
 
+  // This is a workaround for https://github.com/microsoft/playwright/issues/21145
+  async softReload(): Promise<void> {
+    const context = await this._utilityContext();
+    await context.evaluate(() => window.location.reload());
+  }
+
   async rafrafTimeout(timeout: number): Promise<void> {
     if (timeout === 0)
       return;

tests/page/page-history.spec.ts

@@ -187,7 +187,6 @@ it('page.reload should work with cross-origin redirect', async ({ page, server,
 
 it('page.reload should work on a page with a hash', async ({ page, server, browserName }) => {
   it.info().annotations.push({ type: 'issue', description: 'https://github.com/microsoft/playwright/issues/21145' });
-  it.fixme(browserName === 'firefox');
   await page.goto(server.EMPTY_PAGE + '#hash');
   await page.reload();
   await expect(page).toHaveURL(server.EMPTY_PAGE + '#hash');
@@ -237,8 +236,9 @@ it('page.goForward during renderer-initiated navigation', async ({ page, server
   await page.waitForSelector('text=hello');
 });
 
-it('regression test for issue 20791', async ({ page, server }) => {
+it('regression test for issue 20791', async ({ page, server, browserName }) => {
   it.info().annotations.push({ type: 'issue', description: 'https://github.com/microsoft/playwright/issues/20791' });
+  it.fixme(browserName === 'firefox');
   server.setRoute('/iframe.html', (req, res) => {
     res.writeHead(200, { 'content-type': 'text/html; charset=utf-8' });
     // iframe access parent frame to log a value from it.