feat(firefox): roll to r1487 (#36138)

Signed-off-by: Max Schmitt <max@schmitt.mx>
Co-authored-by: microsoft-playwright-automation[bot] <203992400+microsoft-playwright-automation[bot]@users.noreply.github.com>
Co-authored-by: Max Schmitt <max@schmitt.mx>

README.md

@@ -1,6 +1,6 @@
 # 🎭 Playwright
 
-[![npm version](https://img.shields.io/npm/v/playwright.svg)](https://www.npmjs.com/package/playwright) <!-- GEN:chromium-version-badge -->[![Chromium version](https://img.shields.io/badge/chromium-138.0.7204.4-blue.svg?logo=google-chrome)](https://www.chromium.org/Home)<!-- GEN:stop --> <!-- GEN:firefox-version-badge -->[![Firefox version](https://img.shields.io/badge/firefox-137.0-blue.svg?logo=firefoxbrowser)](https://www.mozilla.org/en-US/firefox/new/)<!-- GEN:stop --> <!-- GEN:webkit-version-badge -->[![WebKit version](https://img.shields.io/badge/webkit-18.4-blue.svg?logo=safari)](https://webkit.org/)<!-- GEN:stop --> [![Join Discord](https://img.shields.io/badge/join-discord-infomational)](https://aka.ms/playwright/discord)
+[![npm version](https://img.shields.io/npm/v/playwright.svg)](https://www.npmjs.com/package/playwright) <!-- GEN:chromium-version-badge -->[![Chromium version](https://img.shields.io/badge/chromium-138.0.7204.4-blue.svg?logo=google-chrome)](https://www.chromium.org/Home)<!-- GEN:stop --> <!-- GEN:firefox-version-badge -->[![Firefox version](https://img.shields.io/badge/firefox-139.0-blue.svg?logo=firefoxbrowser)](https://www.mozilla.org/en-US/firefox/new/)<!-- GEN:stop --> <!-- GEN:webkit-version-badge -->[![WebKit version](https://img.shields.io/badge/webkit-18.4-blue.svg?logo=safari)](https://webkit.org/)<!-- GEN:stop --> [![Join Discord](https://img.shields.io/badge/join-discord-infomational)](https://aka.ms/playwright/discord)
 
 ## [Documentation](https://playwright.dev) | [API reference](https://playwright.dev/docs/api/class-playwright)
 
@@ -10,7 +10,7 @@ Playwright is a framework for Web Testing and Automation. It allows testing [Chr
 |   :---   | :---: | :---: | :---:   |
 | Chromium <!-- GEN:chromium-version -->138.0.7204.4<!-- GEN:stop --> | :white_check_mark: | :white_check_mark: | :white_check_mark: |
 | WebKit <!-- GEN:webkit-version -->18.4<!-- GEN:stop --> | :white_check_mark: | :white_check_mark: | :white_check_mark: |
-| Firefox <!-- GEN:firefox-version -->137.0<!-- GEN:stop --> | :white_check_mark: | :white_check_mark: | :white_check_mark: |
+| Firefox <!-- GEN:firefox-version -->139.0<!-- GEN:stop --> | :white_check_mark: | :white_check_mark: | :white_check_mark: |
 
 Headless execution is supported for all browsers on all platforms. Check out [system requirements](https://playwright.dev/docs/intro#system-requirements) for details.
 

packages/playwright-core/browsers.json

@@ -27,9 +27,9 @@
     },
     {
       "name": "firefox",
-      "revision": "1486",
+      "revision": "1487",
       "installByDefault": true,
-      "browserVersion": "137.0"
+      "browserVersion": "139.0"
     },
     {
       "name": "firefox-beta",

packages/playwright-core/src/server/deviceDescriptorsSource.json

@@ -1702,7 +1702,7 @@
     "defaultBrowserType": "chromium"
   },
   "Desktop Firefox HiDPI": {
-    "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0",
+    "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0",
     "screen": {
       "width": 1792,
       "height": 1120
@@ -1762,7 +1762,7 @@
     "defaultBrowserType": "chromium"
   },
   "Desktop Firefox": {
-    "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0",
+    "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0",
     "screen": {
       "width": 1920,
       "height": 1080