Bug 1606604 - [remote] Disable experimental SameSite=Lax by default. r=remote-protocol-reviewers,jgraham

Differential Revision: https://phabricator.services.mozilla.com/D100168

remote/puppeteer-expected.json

@@ -183,7 +183,7 @@
     "PASS"
   ],
   "Cookie specs Page.cookies should get a cookie (cookies.spec.ts)": [
-    "FAIL"
+    "PASS"
   ],
   "Cookie specs Page.cookies should properly report httpOnly cookie (cookies.spec.ts)": [
     "PASS"
@@ -195,7 +195,7 @@
     "PASS"
   ],
   "Cookie specs Page.cookies should get multiple cookies (cookies.spec.ts)": [
-    "FAIL"
+    "PASS"
   ],
   "Cookie specs Page.cookies should get cookies from multiple urls (cookies.spec.ts)": [
     "FAIL"
@@ -246,7 +246,7 @@
     "FAIL"
   ],
   "DefaultBrowserContext page.cookies() should work (defaultbrowsercontext.spec.ts)": [
-    "FAIL"
+    "PASS"
   ],
   "DefaultBrowserContext page.setCookie() should work (defaultbrowsercontext.spec.ts)": [
     "FAIL"

remote/test/puppeteer/src/node/Launcher.ts

@@ -517,6 +517,9 @@ class FirefoxLauncher implements ProductLauncher {
       // jest-puppeteer asserts that no error message is emitted by the console
       'network.cookie.cookieBehavior': 0,
 
+      // Disable experimental feature that is only available in Nightly
+      'network.cookie.sameSite.laxByDefault': false,
+
       // Do not prompt for temporary redirects
       'network.http.prompt-temp-redirect': false,