Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 432 insertions, 0 deletions

diff --git a/browser/base/content/test/caps/browser.ini b/browser/base/content/test/caps/browser.ini
new file mode 100644
index 0000000000..18464cdf77
--- /dev/null
+++ b/browser/base/content/test/caps/browser.ini
@@ -0,0 +1,6 @@
+[DEFAULT]
+
+[browser_principalSerialization_csp.js]
+[browser_principalSerialization_json.js]
+skip-if = debug # deliberately bypass assertions when deserializing. Bug 965637 removed the CSP from Principals, but the remaining bits in such Principals should deserialize correctly.
+[browser_principalSerialization_version1.js]
diff --git a/browser/base/content/test/caps/browser_principalSerialization_csp.js b/browser/base/content/test/caps/browser_principalSerialization_csp.js
new file mode 100644
index 0000000000..909e728794
--- /dev/null
+++ b/browser/base/content/test/caps/browser_principalSerialization_csp.js
@@ -0,0 +1,106 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/*
+ * Within Bug 965637 we move the CSP away from the Principal. Serialized Principals however
+ * might still have CSPs serialized within them. This tests ensures that we do not
+ * encounter a memory corruption when deserializing. It's fine that the deserialized
+ * CSP is null, but the Principal itself should deserialize correctly.
+ */
+
+add_task(async function test_deserialize_principal_with_csp() {
+  /*
+  This test should be resilient to changes in principal serialization, if these are failing then it's likely the code will break session storage.
+  To recreate this for another version, copy the function into the browser console, browse some pages and printHistory.
+
+  Generated with:
+  function printHistory() {
+    let tests = [];
+    let entries = SessionStore.getSessionHistory(gBrowser.selectedTab).entries.map((entry) => { return entry.triggeringPrincipal_base64 });
+    entries.push(E10SUtils.serializePrincipal(gBrowser.selectedTab.linkedBrowser._contentPrincipal));
+    for (let entry of entries) {
+      console.log(entry);
+      let testData = {};
+      testData.input = entry;
+      let principal = E10SUtils.deserializePrincipal(testData.input);
+      testData.output = {};
+      if (principal.URI === null) {
+        testData.output.URI = false;
+      } else {
+        testData.output.URISpec = principal.URI.spec;
+      }
+      testData.output.originAttributes = principal.originAttributes;
+      testData.output.cspJSON = principal.cspJSON;
+
+      tests.push(testData);
+    }
+    return tests;
+  }
+  printHistory(); // Copy this into: serializedPrincipalsFromFirefox
+  */
+
+  let serializedPrincipalsFromFirefox = [
+    {
+      input:
+        "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",
+      output: {
+        // Within Bug 965637 we removed CSP from Principals. Already serialized Principals however should still deserialize correctly (just without the CSP).
+        // "cspJSON": "{\"csp-policies\":[{\"child-src\":[\"https://www.googletagmanager.com\",\"https://www.google-analytics.com\",\"https://www.youtube-nocookie.com\",\"https://trackertest.org\",\"https://www.surveygizmo.com\",\"https://accounts.firefox.com\",\"https://accounts.firefox.com.cn\",\"https://www.youtube.com\"],\"connect-src\":[\"'self'\",\"https://*.mozilla.net\",\"https://*.mozilla.org\",\"https://*.mozilla.com\",\"https://www.googletagmanager.com\",\"https://www.google-analytics.com\",\"https://accounts.firefox.com/\",\"https://accounts.firefox.com.cn/\"],\"default-src\":[\"'self'\",\"https://*.mozilla.net\",\"https://*.mozilla.org\",\"https://*.mozilla.com\"],\"frame-src\":[\"https://www.googletagmanager.com\",\"https://www.google-analytics.com\",\"https://www.youtube-nocookie.com\",\"https://trackertest.org\",\"https://www.surveygizmo.com\",\"https://accounts.firefox.com\",\"https://accounts.firefox.com.cn\",\"https://www.youtube.com\"],\"img-src\":[\"'self'\",\"https://*.mozilla.net\",\"https://*.mozilla.org\",\"https://*.mozilla.com\",\"data:\",\"https://mozilla.org\",\"https://www.googletagmanager.com\",\"https://www.google-analytics.com\",\"https://adservice.google.com\",\"https://adservice.google.de\",\"https://adservice.google.dk\",\"https://creativecommons.org\",\"https://ad.doubleclick.net\"],\"report-only\":false,\"script-src\":[\"'self'\",\"https://*.mozilla.net\",\"https://*.mozilla.org\",\"https://*.mozilla.com\",\"'unsafe-inline'\",\"'unsafe-eval'\",\"https://www.googletagmanager.com\",\"https://www.google-analytics.com\",\"https://tagmanager.google.com\",\"https://www.youtube.com\",\"https://s.ytimg.com\"],\"style-src\":[\"'self'\",\"https://*.mozilla.net\",\"https://*.mozilla.org\",\"https://*.mozilla.com\",\"'unsafe-inline'\"]}]}",
+        URISpec: "https://www.mozilla.org/en-US/",
+        originAttributes: {
+          firstPartyDomain: "",
+          inIsolatedMozBrowser: false,
+          privateBrowsingId: 0,
+          userContextId: 0,
+          geckoViewSessionContextId: "",
+          partitionKey: "",
+        },
+      },
+    },
+    {
+      input:
+        "ZT4OTT7kRfqycpfCC8AeuAAAAAAAAAAAwAAAAAAAAEYB3pRy0IA0EdOTmQAQS6D9QJIHOlRteE8wkTq4cYEyCMYAAAAC/////wAAAbsBAAAAL2h0dHBzOi8vd3d3Lm1vemlsbGEub3JnL2VuLVVTL2ZpcmVmb3gvYWNjb3VudHMvAAAAAAAAAAUAAAAIAAAADwAAAAj/////AAAACP////8AAAAIAAAADwAAABcAAAAYAAAAFwAAABgAAAAXAAAAGAAAAC8AAAAAAAAAL/////8AAAAA/////wAAABf/////AAAAF/////8BAAAAAAAAAAAAAAABCdntGuXUQAS/4CfOuSPZrLPEwK69Xkyth+CNIQ27P58B3pRy0IA0EdOTmQAQS6D9QJIHOlRteE8wkTq4cYEyCMYAAAAC/////wAAAbsBAAAAL2h0dHBzOi8vd3d3Lm1vemlsbGEub3JnL2VuLVVTL2ZpcmVmb3gvYWNjb3VudHMvAAAAAAAAAAUAAAAIAAAADwAAAAj/////AAAACP////8AAAAIAAAADwAAABcAAAAYAAAAFwAAABgAAAAXAAAAGAAAAC8AAAAAAAAAL/////8AAAAA/////wAAABf/////AAAAF/////8BAAAAAAAAAAAAAQAABbYAcwBjAHIAaQBwAHQALQBzAHIAYwAgACcAcwBlAGwAZgAnACAAaAB0AHQAcABzADoALwAvACoALgBtAG8AegBpAGwAbABhAC4AbgBlAHQAIABoAHQAdABwAHMAOgAvAC8AKgAuAG0AbwB6AGkAbABsAGEALgBvAHIAZwAgAGgAdAB0AHAAcwA6AC8ALwAqAC4AbQBvAHoAaQBsAGwAYQAuAGMAbwBtACAAJwB1AG4AcwBhAGYAZQAtAGkAbgBsAGkAbgBlACcAIAAnAHUAbgBzAGEAZgBlAC0AZQB2AGEAbAAnACAAaAB0AHQAcABzADoALwAvAHcAdwB3AC4AZwBvAG8AZwBsAGUAdABhAGcAbQBhAG4AYQBnAGUAcgAuAGMAbwBtACAAaAB0AHQAcABzADoALwAvAHcAdwB3AC4AZwBvAG8AZwBsAGUALQBhAG4AYQBsAHkAdABpAGMAcwAuAGMAbwBtACAAaAB0AHQAcABzADoALwAvAHQAYQBnAG0AYQBuAGEAZwBlAHIALgBnAG8AbwBnAGwAZQAuAGMAbwBtACAAaAB0AHQAcABzADoALwAvAHcAdwB3AC4AeQBvAHUAdAB1AGIAZQAuAGMAbwBtACAAaAB0AHQAcABzADoALwAvAHMALgB5AHQAaQBtAGcALgBjAG8AbQA7ACAAaQBtAGcALQBzAHIAYwAgACcAcwBlAGwAZgAnACAAaAB0AHQAcABzADoALwAvACoALgBtAG8AegBpAGwAbABhAC4AbgBlAHQAIABoAHQAdABwAHMAOgAvAC8AKgAuAG0AbwB6AGkAbABsAGEALgBvAHIAZwAgAGgAdAB0AHAAcwA6AC8ALwAqAC4AbQBvAHoAaQBsAGwAYQAuAGMAbwBtACAAZABhAHQAYQA6ACAAaAB0AHQAcABzADoALwAvAG0AbwB6AGkAbABsAGEALgBvAHIAZwAgAGgAdAB0AHAAcwA6AC8ALwB3AHcAdwAuAGcAbwBvAGcAbABlAHQAYQBnAG0AYQBuAGEAZwBlAHIALgBjAG8AbQAgAGgAdAB0AHAAcwA6AC8ALwB3AHcAdwAuAGcAbwBvAGcAbABlAC0AYQBuAGEAbAB5AHQAaQBjAHMALgBjAG8AbQAgAGgAdAB0AHAAcwA6AC8ALwBhAGQAcwBlAHIAdgBpAGMAZQAuAGcAbwBvAGcAbABlAC4AYwBvAG0AIABoAHQAdABwAHMAOgAvAC8AYQBkAHMAZQByAHYAaQBjAGUALgBnAG8AbwBnAGwAZQAuAGQAZQAgAGgAdAB0AHAAcwA6AC8ALwBhAGQAcwBlAHIAdgBpAGMAZQAuAGcAbwBvAGcAbABlAC4AZABrACAAaAB0AHQAcABzADoALwAvAGMAcgBlAGEAdABpAHYAZQBjAG8AbQBtAG8AbgBzAC4AbwByAGcAIABoAHQAdABwAHMAOgAvAC8AYQBkAC4AZABvAHUAYgBsAGUAYwBsAGkAYwBrAC4AbgBlAHQAOwAgAGQAZQBmAGEAdQBsAHQALQBzAHIAYwAgACcAcwBlAGwAZgAnACAAaAB0AHQAcABzADoALwAvACoALgBtAG8AegBpAGwAbABhAC4AbgBlAHQAIABoAHQAdABwAHMAOgAvAC8AKgAuAG0AbwB6AGkAbABsAGEALgBvAHIAZwAgAGgAdAB0AHAAcwA6AC8ALwAqAC4AbQBvAHoAaQBsAGwAYQAuAGMAbwBtADsAIABmAHIAYQBtAGUALQBzAHIAYwAgAGgAdAB0AHAAcwA6AC8ALwB3AHcAdwAuAGcAbwBvAGcAbABlAHQAYQBnAG0AYQBuAGEAZwBlAHIALgBjAG8AbQAgAGgAdAB0AHAAcwA6AC8ALwB3AHcAdwAuAGcAbwBvAGcAbABlAC0AYQBuAGEAbAB5AHQAaQBjAHMALgBjAG8AbQAgAGgAdAB0AHAAcwA6AC8ALwB3AHcAdwAuAHkAbwB1AHQAdQBiAGUALQBuAG8AYwBvAG8AawBpAGUALgBjAG8AbQAgAGgAdAB0AHAAcwA6AC8ALwB0AHIAYQBjAGsAZQByAHQAZQBzAHQALgBvAHIAZwAgAGgAdAB0AHAAcwA6AC8ALwB3AHcAdwAuAHMAdQByAHYAZQB5AGcAaQB6AG0AbwAuAGMAbwBtACAAaAB0AHQAcABzADoALwAvAGEAYwBjAG8AdQBuAHQAcwAuAGYAaQByAGUAZgBvAHgALgBjAG8AbQAgAGgAdAB0AHAAcwA6AC8ALwBhAGMAYwBvAHUAbgB0AHMALgBmAGkAcgBlAGYAbwB4AC4AYwBvAG0ALgBjAG4AIABoAHQAdABwAHMAOgAvAC8AdwB3AHcALgB5AG8AdQB0AHUAYgBlAC4AYwBvAG0AOwAgAHMAdAB5AGwAZQAtAHMAcgBjACAAJwBzAGUAbABmACcAIABoAHQAdABwAHMAOgAvAC8AKgAuAG0AbwB6AGkAbABsAGEALgBuAGUAdAAgAGgAdAB0AHAAcwA6AC8ALwAqAC4AbQBvAHoAaQBsAGwAYQAuAG8AcgBnACAAaAB0AHQAcABzADoALwAvACoALgBtAG8AegBpAGwAbABhAC4AYwBvAG0AIAAnAHUAbgBzAGEAZgBlAC0AaQBuAGwAaQBuAGUAJwA7ACAAYwBvAG4AbgBlAGMAdAAtAHMAcgBjACAAJwBzAGUAbABmACcAIABoAHQAdABwAHMAOgAvAC8AKgAuAG0AbwB6AGkAbABsAGEALgBuAGUAdAAgAGgAdAB0AHAAcwA6AC8ALwAqAC4AbQBvAHoAaQBsAGwAYQAuAG8AcgBnACAAaAB0AHQAcABzADoALwAvACoALgBtAG8AegBpAGwAbABhAC4AYwBvAG0AIABoAHQAdABwAHMAOgAvAC8AdwB3AHcALgBnAG8AbwBnAGwAZQB0AGEAZwBtAGEAbgBhAGcAZQByAC4AYwBvAG0AIABoAHQAdABwAHMAOgAvAC8AdwB3AHcALgBnAG8AbwBnAGwAZQAtAGEAbgBhAGwAeQB0AGkAYwBzAC4AYwBvAG0AIABoAHQAdABwAHMAOgAvAC8AYQBjAGMAbwB1AG4AdABzAC4AZgBpAHIAZQBmAG8AeAAuAGMAbwBtAC8AIABoAHQAdABwAHMAOgAvAC8AYQBjAGMAbwB1AG4AdABzAC4AZgBpAHIAZQBmAG8AeAAuAGMAbwBtAC4AYwBuAC8AOwAgAGMAaABpAGwAZAAtAHMAcgBjACAAaAB0AHQAcABzADoALwAvAHcAdwB3AC4AZwBvAG8AZwBsAGUAdABhAGcAbQBhAG4AYQBnAGUAcgAuAGMAbwBtACAAaAB0AHQAcABzADoALwAvAHcAdwB3AC4AZwBvAG8AZwBsAGUALQBhAG4AYQBsAHkAdABpAGMAcwAuAGMAbwBtACAAaAB0AHQAcABzADoALwAvAHcAdwB3AC4AeQBvAHUAdAB1AGIAZQAtAG4AbwBjAG8AbwBrAGkAZQAuAGMAbwBtACAAaAB0AHQAcABzADoALwAvAHQAcgBhAGMAawBlAHIAdABlAHMAdAAuAG8AcgBnACAAaAB0AHQAcABzADoALwAvAHcAdwB3AC4AcwB1AHIAdgBlAHkAZwBpAHoAbQBvAC4AYwBvAG0AIABoAHQAdABwAHMAOgAvAC8AYQBjAGMAbwB1AG4AdABzAC4AZgBpAHIAZQBmAG8AeAAuAGMAbwBtACAAaAB0AHQAcABzADoALwAvAGEAYwBjAG8AdQBuAHQAcwAuAGYAaQByAGUAZgBvAHgALgBjAG8AbQAuAGMAbgAgAGgAdAB0AHAAcwA6AC8ALwB3AHcAdwAuAHkAbwB1AHQAdQBiAGUALgBjAG8AbQAA",
+      output: {
+        URISpec: "https://www.mozilla.org/en-US/firefox/accounts/",
+        originAttributes: {
+          firstPartyDomain: "",
+          inIsolatedMozBrowser: false,
+          privateBrowsingId: 0,
+          userContextId: 0,
+          geckoViewSessionContextId: "",
+          partitionKey: "",
+        },
+        // Within Bug 965637 we removed CSP from Principals. Already serialized Principals however should still deserialize correctly (just without the CSP).
+        // "cspJSON": "{\"csp-policies\":[{\"child-src\":[\"https://www.googletagmanager.com\",\"https://www.google-analytics.com\",\"https://www.youtube-nocookie.com\",\"https://trackertest.org\",\"https://www.surveygizmo.com\",\"https://accounts.firefox.com\",\"https://accounts.firefox.com.cn\",\"https://www.youtube.com\"],\"connect-src\":[\"'self'\",\"https://*.mozilla.net\",\"https://*.mozilla.org\",\"https://*.mozilla.com\",\"https://www.googletagmanager.com\",\"https://www.google-analytics.com\",\"https://accounts.firefox.com/\",\"https://accounts.firefox.com.cn/\"],\"default-src\":[\"'self'\",\"https://*.mozilla.net\",\"https://*.mozilla.org\",\"https://*.mozilla.com\"],\"frame-src\":[\"https://www.googletagmanager.com\",\"https://www.google-analytics.com\",\"https://www.youtube-nocookie.com\",\"https://trackertest.org\",\"https://www.surveygizmo.com\",\"https://accounts.firefox.com\",\"https://accounts.firefox.com.cn\",\"https://www.youtube.com\"],\"img-src\":[\"'self'\",\"https://*.mozilla.net\",\"https://*.mozilla.org\",\"https://*.mozilla.com\",\"data:\",\"https://mozilla.org\",\"https://www.googletagmanager.com\",\"https://www.google-analytics.com\",\"https://adservice.google.com\",\"https://adservice.google.de\",\"https://adservice.google.dk\",\"https://creativecommons.org\",\"https://ad.doubleclick.net\"],\"report-only\":false,\"script-src\":[\"'self'\",\"https://*.mozilla.net\",\"https://*.mozilla.org\",\"https://*.mozilla.com\",\"'unsafe-inline'\",\"'unsafe-eval'\",\"https://www.googletagmanager.com\",\"https://www.google-analytics.com\",\"https://tagmanager.google.com\",\"https://www.youtube.com\",\"https://s.ytimg.com\"],\"style-src\":[\"'self'\",\"https://*.mozilla.net\",\"https://*.mozilla.org\",\"https://*.mozilla.com\",\"'unsafe-inline'\"]}]}",
+      },
+    },
+  ];
+
+  for (let test of serializedPrincipalsFromFirefox) {
+    let principal = E10SUtils.deserializePrincipal(test.input);
+
+    for (let key in principal.originAttributes) {
+      is(
+        principal.originAttributes[key],
+        test.output.originAttributes[key],
+        `Ensure value of ${key} is ${test.output.originAttributes[key]}`
+      );
+    }
+
+    if ("URI" in test.output && test.output.URI === false) {
+      is(
+        principal.isContentPrincipal,
+        false,
+        "Should have not have a URI for system"
+      );
+    } else {
+      is(
+        principal.spec,
+        test.output.URISpec,
+        `Should have spec ${test.output.URISpec}`
+      );
+    }
+  }
+});
diff --git a/browser/base/content/test/caps/browser_principalSerialization_json.js b/browser/base/content/test/caps/browser_principalSerialization_json.js
new file mode 100644
index 0000000000..f79f269fd7
--- /dev/null
+++ b/browser/base/content/test/caps/browser_principalSerialization_json.js
@@ -0,0 +1,161 @@
+"use strict";
+
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/*
+  This test file exists to ensure whenever changes to principal serialization happens,
+  we guarantee that the data can be restored and generated into a new principal.
+
+  The tests are written to be brittle so we encode all versions of the changes into the tests.
+*/
+
+add_task(async function test_nullPrincipal() {
+  const nullId = "0";
+  // fields
+  const uri = 0;
+  const suffix = 1;
+
+  const nullReplaceRegex =
+    /moz-nullprincipal:{[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}}/;
+  const NULL_REPLACE = "NULL_PRINCIPAL_URL";
+
+  /*
+   This test should NOT be resilient to changes in versioning,
+   however it exists purely to verify the code doesn't unintentionally change without updating versioning and migration code.
+  */
+  let tests = [
+    {
+      input: { OA: {} },
+      expected: `{"${nullId}":{"${uri}":"${NULL_REPLACE}"}}`,
+    },
+    {
+      input: { OA: {} },
+      expected: `{"${nullId}":{"${uri}":"${NULL_REPLACE}"}}`,
+    },
+    {
+      input: { OA: { userContextId: 0 } },
+      expected: `{"${nullId}":{"${uri}":"${NULL_REPLACE}"}}`,
+    },
+    {
+      input: { OA: { userContextId: 2 } },
+      expected: `{"${nullId}":{"${uri}":"${NULL_REPLACE}","${suffix}":"^userContextId=2"}}`,
+    },
+    {
+      input: { OA: { privateBrowsingId: 1 } },
+      expected: `{"${nullId}":{"${uri}":"${NULL_REPLACE}","${suffix}":"^privateBrowsingId=1"}}`,
+    },
+    {
+      input: { OA: { privateBrowsingId: 0 } },
+      expected: `{"${nullId}":{"${uri}":"${NULL_REPLACE}"}}`,
+    },
+  ];
+
+  for (let test of tests) {
+    let p = Services.scriptSecurityManager.createNullPrincipal(test.input.OA);
+    let sp = E10SUtils.serializePrincipal(p);
+    // Not sure why cppjson is adding a \n here
+    let spr = sp.replace(nullReplaceRegex, NULL_REPLACE);
+    is(
+      test.expected,
+      spr,
+      "Expected serialized object for " + JSON.stringify(test.input)
+    );
+    let dp = E10SUtils.deserializePrincipal(sp);
+
+    // Check all the origin attributes
+    for (let key in test.input.OA) {
+      is(
+        dp.originAttributes[key],
+        test.input.OA[key],
+        "Ensure value of " + key + " is " + test.input.OA[key]
+      );
+    }
+  }
+});
+
+add_task(async function test_contentPrincipal() {
+  const contentId = "1";
+  // fields
+  const content = 0;
+  // const domain = 1;
+  const suffix = 2;
+  // const csp = 3;
+
+  /*
+   This test should NOT be resilient to changes in versioning,
+   however it exists purely to verify the code doesn't unintentionally change without updating versioning and migration code.
+  */
+  let tests = [
+    {
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      input: { uri: "http://example.com/", OA: {} },
+      expected: `{"${contentId}":{"${content}":"http://example.com/"}}`,
+    },
+    {
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      input: { uri: "http://mozilla1.com/", OA: {} },
+      expected: `{"${contentId}":{"${content}":"http://mozilla1.com/"}}`,
+    },
+    {
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      input: { uri: "http://mozilla2.com/", OA: { userContextId: 0 } },
+      expected: `{"${contentId}":{"${content}":"http://mozilla2.com/"}}`,
+    },
+    {
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      input: { uri: "http://mozilla3.com/", OA: { userContextId: 2 } },
+      expected: `{"${contentId}":{"${content}":"http://mozilla3.com/","${suffix}":"^userContextId=2"}}`,
+    },
+    {
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      input: { uri: "http://mozilla4.com/", OA: { privateBrowsingId: 1 } },
+      expected: `{"${contentId}":{"${content}":"http://mozilla4.com/","${suffix}":"^privateBrowsingId=1"}}`,
+    },
+    {
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      input: { uri: "http://mozilla5.com/", OA: { privateBrowsingId: 0 } },
+      expected: `{"${contentId}":{"${content}":"http://mozilla5.com/"}}`,
+    },
+  ];
+
+  for (let test of tests) {
+    let uri = Services.io.newURI(test.input.uri);
+    let p = Services.scriptSecurityManager.createContentPrincipal(
+      uri,
+      test.input.OA
+    );
+    let sp = E10SUtils.serializePrincipal(p);
+    is(test.expected, sp, "Expected serialized object for " + test.input.uri);
+    let dp = E10SUtils.deserializePrincipal(sp);
+    is(dp.URI.spec, test.input.uri, "Ensure spec is the same");
+
+    // Check all the origin attributes
+    for (let key in test.input.OA) {
+      is(
+        dp.originAttributes[key],
+        test.input.OA[key],
+        "Ensure value of " + key + " is " + test.input.OA[key]
+      );
+    }
+  }
+});
+
+add_task(async function test_systemPrincipal() {
+  const systemId = "3";
+  /*
+   This test should NOT be resilient to changes in versioning,
+   however it exists purely to verify the code doesn't unintentionally change without updating versioning and migration code.
+  */
+  const expected = `{"${systemId}":{}}`;
+
+  let p = Services.scriptSecurityManager.getSystemPrincipal();
+  let sp = E10SUtils.serializePrincipal(p);
+  is(expected, sp, "Expected serialized object for system principal");
+  let dp = E10SUtils.deserializePrincipal(sp);
+  is(
+    dp,
+    Services.scriptSecurityManager.getSystemPrincipal(),
+    "Deserialized the system principal"
+  );
+});
diff --git a/browser/base/content/test/caps/browser_principalSerialization_version1.js b/browser/base/content/test/caps/browser_principalSerialization_version1.js
new file mode 100644
index 0000000000..6c4a41e911
--- /dev/null
+++ b/browser/base/content/test/caps/browser_principalSerialization_version1.js
@@ -0,0 +1,159 @@
+"use strict";
+
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/*
+  This test file exists to ensure whenever changes to principal serialization happens,
+  we guarantee that the data can be restored and generated into a new principal.
+
+  The tests are written to be brittle so we encode all versions of the changes into the tests.
+*/
+
+add_task(function test_nullPrincipal() {
+  /*
+   As Null principals are designed to be non deterministic we just need to ensure that
+   a previous serialized version matches what it was generated as.
+
+   This test should be resilient to changes in versioning, however it should also be duplicated for a new serialization change.
+  */
+  // Principal created with: E10SUtils.serializePrincipal(Services.scriptSecurityManager.createNullPrincipal({ }));
+  let p = E10SUtils.deserializePrincipal(
+    "vQZuXxRvRHKDMXv9BbHtkAAAAAAAAAAAwAAAAAAAAEYAAAA4bW96LW51bGxwcmluY2lwYWw6ezU2Y2FjNTQwLTg2NGQtNDdlNy04ZTI1LTE2MTRlYWI1MTU1ZX0AAAAA"
+  );
+  is(
+    "moz-nullprincipal:{56cac540-864d-47e7-8e25-1614eab5155e}",
+    p.URI.spec,
+    "Deserialized principal doesn't have the correct URI"
+  );
+
+  // Principal created with: E10SUtils.serializePrincipal(Services.scriptSecurityManager.createNullPrincipal({ userContextId: 2 }));
+  let p2 = E10SUtils.deserializePrincipal(
+    "vQZuXxRvRHKDMXv9BbHtkAAAAAAAAAAAwAAAAAAAAEYAAAA4bW96LW51bGxwcmluY2lwYWw6ezA1ZjllN2JhLWIwODMtNDJhMi1iNDdkLTZiODRmNmYwYTM3OX0AAAAQXnVzZXJDb250ZXh0SWQ9Mg=="
+  );
+  is(
+    "moz-nullprincipal:{05f9e7ba-b083-42a2-b47d-6b84f6f0a379}",
+    p2.URI.spec,
+    "Deserialized principal doesn't have the correct URI"
+  );
+  is(p2.originAttributes.userContextId, 2, "Expected a userContextId of 2");
+});
+
+add_task(async function test_realHistoryCheck() {
+  /*
+  This test should be resilient to changes in principal serialization, if these are failing then it's likely the code will break session storage.
+  To recreate this for another version, copy the function into the browser console, browse some pages and printHistory.
+
+  Generated with:
+  function printHistory() {
+    let tests = [];
+    let entries = SessionStore.getSessionHistory(gBrowser.selectedTab).entries.map((entry) => { return entry.triggeringPrincipal_base64 });
+    entries.push(E10SUtils.serializePrincipal(gBrowser.selectedTab.linkedBrowser._contentPrincipal));
+    for (let entry of entries) {
+      console.log(entry);
+      let testData = {};
+      testData.input = entry;
+      let principal = E10SUtils.deserializePrincipal(testData.input);
+      testData.output = {};
+      if (principal.URI === null) {
+        testData.output.URI = false;
+      } else {
+        testData.output.URISpec = principal.URI.spec;
+      }
+      testData.output.originAttributes = principal.originAttributes;
+
+      tests.push(testData);
+    }
+    return tests;
+  }
+  printHistory(); // Copy this into: serializedPrincipalsFromFirefox
+  */
+
+  let serializedPrincipalsFromFirefox = [
+    {
+      input: "SmIS26zLEdO3ZQBgsLbOywAAAAAAAAAAwAAAAAAAAEY=",
+      output: {
+        URI: false,
+        originAttributes: {
+          firstPartyDomain: "",
+          inIsolatedMozBrowser: false,
+          privateBrowsingId: 0,
+          userContextId: 0,
+          geckoViewSessionContextId: "",
+          partitionKey: "",
+        },
+      },
+    },
+    {
+      input:
+        "ZT4OTT7kRfqycpfCC8AeuAAAAAAAAAAAwAAAAAAAAEYB3pRy0IA0EdOTmQAQS6D9QJIHOlRteE8wkTq4cYEyCMYAAAAC/////wAAAbsBAAAAe2h0dHBzOi8vZGV2ZWxvcGVyLm1vemlsbGEub3JnL2VuLVVTLz91dG1fc291cmNlPXd3dy5tb3ppbGxhLm9yZyZ1dG1fbWVkaXVtPXJlZmVycmFsJnV0bV9jYW1wYWlnbj1uYXYmdXRtX2NvbnRlbnQ9ZGV2ZWxvcGVycwAAAAAAAAAFAAAACAAAABUAAAAA/////wAAAAD/////AAAACAAAABUAAAAdAAAAXgAAAB0AAAAHAAAAHQAAAAcAAAAkAAAAAAAAAAD/////AAAAAP////8AAAAlAAAAVgAAAAD/////AQAAAAAAAAAAAAAAAA==",
+      output: {
+        URISpec:
+          "https://developer.mozilla.org/en-US/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=developers",
+        originAttributes: {
+          firstPartyDomain: "",
+          inIsolatedMozBrowser: false,
+          privateBrowsingId: 0,
+          userContextId: 0,
+          geckoViewSessionContextId: "",
+          partitionKey: "",
+        },
+      },
+    },
+    {
+      input: "SmIS26zLEdO3ZQBgsLbOywAAAAAAAAAAwAAAAAAAAEY=",
+      output: {
+        URI: false,
+        originAttributes: {
+          firstPartyDomain: "",
+          inIsolatedMozBrowser: false,
+          privateBrowsingId: 0,
+          userContextId: 0,
+          geckoViewSessionContextId: "",
+          partitionKey: "",
+        },
+      },
+    },
+    {
+      input:
+        "vQZuXxRvRHKDMXv9BbHtkAAAAAAAAAAAwAAAAAAAAEYAAAA4bW96LW51bGxwcmluY2lwYWw6ezA0NWNhMThkLTQzNmMtNDc0NC1iYmI2LWIxYTE1MzY2ZGY3OX0AAAAA",
+      output: {
+        URISpec: "moz-nullprincipal:{045ca18d-436c-4744-bbb6-b1a15366df79}",
+        originAttributes: {
+          firstPartyDomain: "",
+          inIsolatedMozBrowser: false,
+          privateBrowsingId: 0,
+          userContextId: 0,
+          geckoViewSessionContextId: "",
+          partitionKey: "",
+        },
+      },
+    },
+  ];
+
+  for (let test of serializedPrincipalsFromFirefox) {
+    let principal = E10SUtils.deserializePrincipal(test.input);
+
+    for (let key in principal.originAttributes) {
+      is(
+        principal.originAttributes[key],
+        test.output.originAttributes[key],
+        `Ensure value of ${key} is ${test.output.originAttributes[key]}`
+      );
+    }
+
+    if ("URI" in test.output && test.output.URI === false) {
+      is(
+        principal.isContentPrincipal,
+        false,
+        "Should have not have a URI for system"
+      );
+    } else {
+      is(
+        principal.spec,
+        test.output.URISpec,
+        `Should have spec ${test.output.URISpec}`
+      );
+    }
+  }
+});