Adding upstream version 124.0.1.upstream/124.0.1

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

19 files changed, 2003 insertions, 0 deletions

diff --git a/toolkit/components/certviewer/tests/browser/adjustedCerts.js b/toolkit/components/certviewer/tests/browser/adjustedCerts.js
new file mode 100644
index 0000000000..0b0c089a61
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/adjustedCerts.js
@@ -0,0 +1,261 @@
+"use strict";
+
+/*
+To change this file you will have to add a function to download a file in toolkit/components/certviewer/content/certviewer.mjs (e.g: https://ourcodeworld.com/articles/read/189/how-to-create-a-file-and-generate-a-download-with-javascript-in-the-browser-without-a-server),
+download adjustedCerts (e.g: download("out.txt", JSON.stringify(adjustedCerts)), do it after this line https://searchfox.org/mozilla-central/rev/e3fc8f8970491aef14d3212b2d052942f4d29818/toolkit/components/certviewer/content/certviewer.mjs#428),
+then open Nightly and go to about:certificate?cert=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%2FXqYQkzFMBlXmqkzC%2BFdTRBYyneZw5Pz%2BXWQvL%2B74JW6LsWNc2EF0xCEqLOJuC9zjPAqbr7uroNLghGxYf13YdqbG5oj%2F4x%2BogEG3dF%2FU5YIwVr658DKyESMV6eoYV9mDVfTuJastkqcwero%2B5ZAKfYVMLUEsMwFtoTDJFmVf6JlkOWwsxp1WcQ%2FMRQK1cyqOoUFUgYylgdh3yeCDPeF22Ax8AlQxbcaI%2BGwfQL1FB7Jy%2Bh%2BKjME9lE%2FUpgV6Qt2R1xNSmvFCBWu%2BNFX6epwFP%2FJRbkMfLz0beYFUvmMgLtwVpEPSwIDAQABo4IDeTCCA3UwHwYDVR0jBBgwFoAUPdNQpdagre7zSmAKZdMh1Pj41g8wHQYDVR0OBBYEFMnCU2FmnV%2BrJfQmzQ84mqhJ6kipMCUGA1UdEQQeMByCCmdpdGh1Yi5jb22CDnd3dy5naXRodWIuY29tMA4GA1UdDwEB%2FwQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwdQYDVR0fBG4wbDA0oDKgMIYuaHR0cDovL2NybDMuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDA0oDKgMIYuaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDBLBgNVHSAERDBCMDcGCWCGSAGG%2FWwCATAqMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy5kaWdpY2VydC5jb20vQ1BTMAcGBWeBDAEBMIGIBggrBgEFBQcBAQR8MHowJAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTBSBggrBgEFBQcwAoZGaHR0cDovL2NhY2VydHMuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0U0hBMkV4dGVuZGVkVmFsaWRhdGlvblNlcnZlckNBLmNydDAMBgNVHRMBAf8EAjAAMIIBfgYKKwYBBAHWeQIEAgSCAW4EggFqAWgAdgCkuQmQtBhYFIe7E6LMZ3AKPDWYBPkb37jjd80OyA3cEAAAAWNBYm0KAAAEAwBHMEUCIQDRZp38cTWsWH2GdBpe%2FuPTWnsu%2Fm4BEC2%2BdIcvSykZYgIgCP5gGv6yzaazxBK2NwGdmmyuEFNSg2pARbMJlUFgU5UAdgBWFAaaL9fC7NP14b1Esj7HRna5vJkRXMDvlJhV1onQ3QAAAWNBYm0tAAAEAwBHMEUCIQCi7omUvYLm0b2LobtEeRAYnlIo7n6JxbYdrtYdmPUWJQIgVgw1AZ51vK9ENinBg22FPxb82TvNDO05T17hxXRC2IYAdgC72d%2B8H4pxtZOUI5eqkntHOFeVCqtS6BqQlmQ2jh7RhQAAAWNBYm3fAAAEAwBHMEUCIQChzdTKUU2N%2BXcqcK0OJYrN8EYynloVxho4yPk6Dq3EPgIgdNH5u8rC3UcslQV4B9o0a0w204omDREGKTVuEpxGeOQwDQYJKoZIhvcNAQELBQADggEBAHAPWpanWOW%2Fip2oJ5grAH8mqQfaunuCVE%2Bvac%2B88lkDK%2FLVdFgl2B6kIHZiYClzKtfczG93hWvKbST4NRNHP9LiaQqdNC17e5vNHnXVUGw%2ByxyjMLGqkgepOnZ2Rb14kcTOGp4i5AuJuuaMwXmCo7jUwPwfLe1NUlVBKqg6LK0Hcq4K0sZnxE8HFxiZ92WpV2AVWjRMEc%2F2z2shNoDvxvFUYyY1Oe67xINkmyQKc%2BygSBZzyLnXSFVWmHr3u5dcaaQGGAR42v6Ydr4iL38Hd4dOiBma%2BFXsXBIqWUjbST4VXmdaol7uzFMojA4zkxQDZAvF5XgJlAFadfySna%2Fteik%3D
+open the file, and finally copy and paste it here like
+
+const adjustedCerts = <what you just copied>;
+*/
+
+const adjustedCerts = [
+  {
+    certItems: [
+      {
+        sectionId: "subject-name",
+        sectionItems: [
+          { labelId: "business-category", info: "Private Organization" },
+          { labelId: "inc-country", info: "US" },
+          { labelId: "inc-state-province", info: "Delaware" },
+          { labelId: "serial-number", info: "5157550" },
+          { labelId: "country", info: "US" },
+          { labelId: "state-province", info: "California" },
+          { labelId: "locality", info: "San Francisco" },
+          { labelId: "organization", info: "GitHub, Inc." },
+          { labelId: "common-name", info: "github.com" },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "issuer-name",
+        sectionItems: [
+          { labelId: "country", info: "US" },
+          { labelId: "organization", info: "DigiCert Inc" },
+          { labelId: "organizational-unit", info: "www.digicert.com" },
+          {
+            labelId: "common-name",
+            info: "DigiCert SHA2 Extended Validation Server CA",
+          },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "validity",
+        sectionItems: [
+          {
+            labelId: "not-before",
+            info: {
+              local: "5/7/2018, 9:00:00 PM (Brasilia Standard Time)",
+              utc: "Tue, 08 May 2018 00:00:00 GMT",
+            },
+          },
+          {
+            labelId: "not-after",
+            info: {
+              local: "6/3/2020, 9:00:00 AM (Brasilia Standard Time)",
+              utc: "Wed, 03 Jun 2020 12:00:00 GMT",
+            },
+          },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "subject-alt-names",
+        sectionItems: [
+          { labelId: "dns-name", info: "github.com" },
+          { labelId: "dns-name", info: "www.github.com" },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "public-key-info",
+        sectionItems: [
+          { labelId: "algorithm", info: "RSA" },
+          { labelId: "key-size", info: 2048 },
+          { labelId: "exponent", info: 65537 },
+          {
+            labelId: "modulus",
+            info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
+          },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "miscellaneous",
+        sectionItems: [
+          {
+            labelId: "serial-number",
+            info: "0A:06:30:42:7F:5B:BC:ED:69:57:39:65:93:B6:45:1F",
+          },
+          {
+            labelId: "signature-algorithm",
+            info: "SHA-256 with RSA Encryption",
+          },
+          { labelId: "version", info: "3" },
+          {
+            labelId: "download",
+            info: "PEM (cert)PEM (chain)",
+          },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "fingerprints",
+        sectionItems: [
+          {
+            labelId: "sha-256",
+            info: "31:11:50:0C:4A:66:01:2C:DA:E3:33:EC:3F:CA:1C:9D:DE:45:C9:54:44:0E:7E:E4:13:71:6B:FF:36:63:C0:74",
+          },
+          {
+            labelId: "sha-1",
+            info: "CA:06:F5:6B:25:8B:7A:0D:4F:2B:05:47:09:39:47:86:51:15:19:84",
+          },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "basic-constraints",
+        sectionItems: [{ labelId: "certificate-authority", info: false }],
+        Critical: true,
+      },
+      {
+        sectionId: "key-usages",
+        sectionItems: [
+          {
+            labelId: "purposes",
+            info: ["Digital Signature", "Key Encipherment"],
+          },
+        ],
+        Critical: true,
+      },
+      {
+        sectionId: "extended-key-usages",
+        sectionItems: [
+          {
+            labelId: "purposes",
+            info: ["Server Authentication", "Client Authentication"],
+          },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "subject-key-id",
+        sectionItems: [
+          {
+            labelId: "key-id",
+            info: "C9:C2:53:61:66:9D:5F:AB:25:F4:26:CD:0F:38:9A:A8:49:EA:48:A9",
+          },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "authority-key-id",
+        sectionItems: [
+          {
+            labelId: "key-id",
+            info: "3D:D3:50:A5:D6:A0:AD:EE:F3:4A:60:0A:65:D3:21:D4:F8:F8:D6:0F",
+          },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "crl-endpoints",
+        sectionItems: [
+          {
+            labelId: "distribution-point",
+            info: "http://crl3.digicert.com/sha2-ev-server-g2.crl",
+          },
+          {
+            labelId: "distribution-point",
+            info: "http://crl4.digicert.com/sha2-ev-server-g2.crl",
+          },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "authority-info-aia",
+        sectionItems: [
+          { labelId: "location", info: "http://ocsp.digicert.com" },
+          {
+            labelId: "method",
+            info: "Online Certificate Status Protocol (OCSP)",
+          },
+          {
+            labelId: "location",
+            info: "http://cacerts.digicert.com/DigiCertSHA2ExtendedValidationServerCA.crt",
+          },
+          { labelId: "method", info: "CA Issuers" },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "certificate-policies",
+        sectionItems: [
+          {
+            labelId: "policy",
+            info: "ANSI Organizational Identifier ( 2.16.840 )",
+          },
+          { labelId: "value", info: "2.16.840.1.114412.2.1" },
+          {
+            labelId: "qualifier",
+            info: "Practices Statement ( 1.3.6.1.5.5.7.2.1 )",
+          },
+          { labelId: "value", info: "https://www.digicert.com/CPS" },
+          { labelId: "policy", info: "Certificate Type ( 2.23.140.1.1 )" },
+          { labelId: "value", info: "Extended Validation" },
+        ],
+        Critical: false,
+      },
+      {
+        sectionId: "embedded-scts",
+        sectionItems: [
+          {
+            labelId: "logid",
+            info: "A4:B9:09:90:B4:18:58:14:87:BB:13:A2:CC:67:70:0A:3C:35:98:04:F9:1B:DF:B8:E3:77:CD:0E:C8:0D:DC:10",
+          },
+          { labelId: "name", info: "Google “Pilot”" },
+          { labelId: "signaturealgorithm", info: "SHA-256 ECDSA" },
+          { labelId: "version", info: 1 },
+          {
+            labelId: "timestamp",
+            info: {
+              local: "5/8/2018, 5:12:39 PM (Brasilia Standard Time)",
+              utc: "Tue, 08 May 2018 20:12:39 GMT",
+            },
+          },
+          {
+            labelId: "logid",
+            info: "56:14:06:9A:2F:D7:C2:EC:D3:F5:E1:BD:44:B2:3E:C7:46:76:B9:BC:99:11:5C:C0:EF:94:98:55:D6:89:D0:DD",
+          },
+          { labelId: "name", info: "DigiCert Server" },
+          { labelId: "signaturealgorithm", info: "SHA-256 ECDSA" },
+          { labelId: "version", info: 1 },
+          {
+            labelId: "timestamp",
+            info: {
+              local: "5/8/2018, 5:12:39 PM (Brasilia Standard Time)",
+              utc: "Tue, 08 May 2018 20:12:39 GMT",
+            },
+          },
+          {
+            labelId: "logid",
+            info: "BB:D9:DF:BC:1F:8A:71:B5:93:94:23:97:AA:92:7B:47:38:57:95:0A:AB:52:E8:1A:90:96:64:36:8E:1E:D1:85",
+          },
+          { labelId: "name", info: "Google “Skydiver”" },
+          { labelId: "signaturealgorithm", info: "SHA-256 ECDSA" },
+          { labelId: "version", info: 1 },
+          {
+            labelId: "timestamp",
+            info: {
+              local: "5/8/2018, 5:12:39 PM (Brasilia Standard Time)",
+              utc: "Tue, 08 May 2018 20:12:39 GMT",
+            },
+          },
+        ],
+        Critical: false,
+      },
+    ],
+    tabName: "github.com",
+  },
+];
diff --git a/toolkit/components/certviewer/tests/browser/browser.toml b/toolkit/components/certviewer/tests/browser/browser.toml
new file mode 100644
index 0000000000..c4fb2be753
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser.toml
@@ -0,0 +1,38 @@
+[DEFAULT]
+support-files = [
+  "head.js",
+  "adjustedCerts.js",
+]
+
+["browser_aboutcertificateviewer.js"]
+
+["browser_certificateTabLink.js"]
+
+["browser_checkAuthorityKeyID.js"]
+
+["browser_checkLongHex.js"]
+
+["browser_checkMissingCommonName.js"]
+
+["browser_checkNonEmptyFields.js"]
+
+["browser_checkNonRepeatedCertTabs.js"]
+
+["browser_checkNonUndefinedStrings.js"]
+
+["browser_checkOCSP.js"]
+skip-if = ["true"] # Bug 1596313
+
+["browser_checkStandAlonePage.js"]
+
+["browser_checkValiditySection.js"]
+
+["browser_downloadLink.js"]
+
+["browser_handleMultipleCertsURL.js"]
+skip-if = ["true"] # Bug 1626853
+
+["browser_openTabAndSendCertInfo.js"]
+support-files = ["dummy_page.html"]
+
+["browser_renderCertToUI.js"]
diff --git a/toolkit/components/certviewer/tests/browser/browser_aboutcertificateviewer.js b/toolkit/components/certviewer/tests/browser/browser_aboutcertificateviewer.js
new file mode 100644
index 0000000000..efd78fc6f5
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_aboutcertificateviewer.js
@@ -0,0 +1,81 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const validCert =
+  "about:certificate?cert=MIIGMDCCBRigAwIBAgIQCa2oS7Nau6nwv1WyRNIJnzANBgkqhkiG9w0BAQsFADBwMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMS8wLQYDVQQDEyZEaWdpQ2VydCBTSEEyIEhpZ2ggQXNzdXJhbmNlIFNlcnZlciBDQTAeFw0xOTA2MDYwMDAwMDBaFw0xOTA5MDQxMjAwMDBaMGExCzAJBgNVBAYTAlVTMQswCQYDVQQIEwJDQTETMBEGA1UEBxMKTWVubG8gUGFyazEXMBUGA1UEChMORmFjZWJvb2ssIEluYy4xFzAVBgNVBAMMDiouZmFjZWJvb2suY29tMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEEALPlfjd8gHkIMDeBOFhRt0e%2B%2F3fdm%2BZdzdM4s1WIHVbYztgmdEy20PUwDCviYKJX4GG%2BT9ivT8kJ%2FvWl1P%2FYqOCA54wggOaMB8GA1UdIwQYMBaAFFFo%2F5CvAgd1PMzZZWRiohK4WXI7MB0GA1UdDgQWBBTsQZVRTuib7KY9w3FfOYsZHvOC9zCBxwYDVR0RBIG%2FMIG8gg4qLmZhY2Vib29rLmNvbYINbWVzc2VuZ2VyLmNvbYILKi5mYmNkbi5uZXSCCCouZmIuY29tghAqLm0uZmFjZWJvb2suY29tggZmYi5jb22CDiouZmFjZWJvb2submV0gg4qLnh4LmZiY2RuLm5ldIIOKi54ei5mYmNkbi5uZXSCDyoubWVzc2VuZ2VyLmNvbYILKi5mYnNieC5jb22CDioueHkuZmJjZG4ubmV0ggxmYWNlYm9vay5jb20wDgYDVR0PAQH%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%2FBAIwADCCAQQGCisGAQQB1nkCBAIEgfUEgfIA8AB1AKS5CZC0GFgUh7sTosxncAo8NZgE%2BRvfuON3zQ7IDdwQAAABay5CAaUAAAQDAEYwRAIgMwBM6q%2BdBwu2mNtMMjTEwJZZxyoUlHUEYO%2BbfkId%2F9MCIAQ2bxhnxrapYv74fzyoTkt9m%2BELq6%2B43OVpivRVKDKTAHcAdH7agzGtMxCRIZzOJU9CcMK%2F%2FV5CIAjGNzV55hB7zFYAAAFrLkIA%2FAAABAMASDBGAiEA0x1xPWue6RMSE9nbjYBt637CRC86ixrODP%2FEIlI5mCgCIQCHNdqgOlswd0LqaW4QRii2JHN4bnoEj%2FD9j7%2BkqEB7LjANBgkqhkiG9w0BAQsFAAOCAQEAnRdIVNZ850s7IvLgg%2BU9kKxA18kLKVpIF%2FrJHkXTkymvBHKAGOFNfzqF2YxHFhkDMIuoMO2F%2BA1E0Eo8zb1atL6%2FL59broEHTOH6xFmJAlZW0h6mZg8iRJ9Ae0pTN%2FfowaoN9aFVRnVr9ccKhOdqsXYyEZ3Ze39sEwx7Uau9KhzyuJW12Jh3S%2BZJYUdBADeeJNL5ZXSUFIyjgkwSQZPaaWAzSGHZFt3sWhMjdNoBkjRJFlASLDM3m1ZWsKA47vuXvJc%2FDXT35lC1DJmyhYb9qNPR71a1hJ8TS7vUwdDd%2BdEHiJj2wQLV3m7Tn7YvWyJOEyi4n6%2FrPqT44LZmgK7HWw%3D%3D&cert=MIIEsTCCA5mgAwIBAgIQBOHnpNxc8vNtwCtCuF0VnzANBgkqhkiG9w0BAQsFADBsMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSswKQYDVQQDEyJEaWdpQ2VydCBIaWdoIEFzc3VyYW5jZSBFViBSb290IENBMB4XDTEzMTAyMjEyMDAwMFoXDTI4MTAyMjEyMDAwMFowcDELMAkGA1UEBhMCVVMxFTATBgNVBAoTDERpZ2lDZXJ0IEluYzEZMBcGA1UECxMQd3d3LmRpZ2ljZXJ0LmNvbTEvMC0GA1UEAxMmRGlnaUNlcnQgU0hBMiBIaWdoIEFzc3VyYW5jZSBTZXJ2ZXIgQ0EwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC24C%2FCJAbIbQRf1%2B8KZAayfSImZRauQkCbztyfn3YHPsMwVYcZuU%2BUDlqUH1VWtMICKq%2FQmO4LQNfE0DtyyBSe75CxEamu0si4QzrZCwvV1ZX1QK%2FIHe1NnF9Xt4ZQaJn1itrSxwUfqJfJ3KSxgoQtxq2lnMcZgqaFD15EWCo3j%2F018QsIJzJa9buLnqS9UdAn4t07QjOjBSjEuyjMmqwrIw14xnvmXnG3Sj4I%2B4G3FhahnSMSTeXXkgisdaScus0Xsh5ENWV%2FUyU50RwKmmMbGZJ0aAo3wsJSSMs5WqK24V3B3aAguCGikyZvFEohQcftbZvySC%2FzA%2FWiaJJTL17jAgMBAAGjggFJMIIBRTASBgNVHRMBAf8ECDAGAQH%2FAgEAMA4GA1UdDwEB%2FwQEAwIBhjAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwNAYIKwYBBQUHAQEEKDAmMCQGCCsGAQUFBzABhhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wSwYDVR0fBEQwQjBAoD6gPIY6aHR0cDovL2NybDQuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0SGlnaEFzc3VyYW5jZUVWUm9vdENBLmNybDA9BgNVHSAENjA0MDIGBFUdIAAwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cuZGlnaWNlcnQuY29tL0NQUzAdBgNVHQ4EFgQUUWj%2FkK8CB3U8zNllZGKiErhZcjswHwYDVR0jBBgwFoAUsT7DaQP4v0cB1JgmGggC72NkK8MwDQYJKoZIhvcNAQELBQADggEBABiKlYkD5m3fXPwdaOpKj4PWUS%2BNa0QWnqxj9dJubISZi6qBcYRb7TROsLd5kinMLYBq8I4g4Xmk%2FgNHE%2Br1hspZcX30BJZr01lYPf7TMSVcGDiEo%2Bafgv2MW5gxTs14nhr9hctJqvIni5ly%2FD6q1UEL2tU2ob8cbkdJf17ZSHwD2f2LSaCYJkJA69aSEaRkCldUxPUd1gJea6zuxICaEnL6VpPX%2F78whQYwvwt%2FTv9XBZ0k7YXDK%2FumdaisLRbvfXknsuvCnQsH6qqF0wGjIChBWUMo0oHjqvbsezt3tkBigAVBRQHvFwY%2B3sAzm2fTYS5yh%2BRp%2FBIAV0AecPUeybQ%3D&cert=MIIDxTCCAq2gAwIBAgIQAqxcJmoLQJuPC3nyrkYldzANBgkqhkiG9w0BAQUFADBsMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSswKQYDVQQDEyJEaWdpQ2VydCBIaWdoIEFzc3VyYW5jZSBFViBSb290IENBMB4XDTA2MTExMDAwMDAwMFoXDTMxMTExMDAwMDAwMFowbDELMAkGA1UEBhMCVVMxFTATBgNVBAoTDERpZ2lDZXJ0IEluYzEZMBcGA1UECxMQd3d3LmRpZ2ljZXJ0LmNvbTErMCkGA1UEAxMiRGlnaUNlcnQgSGlnaCBBc3N1cmFuY2UgRVYgUm9vdCBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMbM5XPm%2B9S75S0tMqbf5YE%2Fyc0lSbZxKsPVlDRnogocsF9ppkCxxLeyj9CYpKlBWTrT3JTWPNt0OKRKzE0lgvdKpVMSOO7zSW1xkX5jtqumX8OkhPhPYlG%2B%2BMXs2ziS4wblCJEMxChBVfvLWokVfnHoNb9Ncgk9vjo4UFt3MRuNs8ckRZqnrG0AFFoEt7oT61EKmEFBIk5lYYeBQVCmeVyJ3hlKV9Uu5l0cUyx%2BmM0aBhakaHPQNAQTXKFx01p8VdteZOE3hzBWBOURtCmAEvF5OYiiAhF8J2a3iLd48soKqDirCmTCv2ZdlYTBoSUeh10aUAsgEsxBu24LUTi4S8sCAwEAAaNjMGEwDgYDVR0PAQH%2FBAQDAgGGMA8GA1UdEwEB%2FwQFMAMBAf8wHQYDVR0OBBYEFLE%2Bw2kD%2BL9HAdSYJhoIAu9jZCvDMB8GA1UdIwQYMBaAFLE%2Bw2kD%2BL9HAdSYJhoIAu9jZCvDMA0GCSqGSIb3DQEBBQUAA4IBAQAcGgaX3NecnzyIZgYIVyHbIUf4KmeqvxgydkAQV8GK83rZEWWONfqe%2FEW1ntlMMUu4kehDLI6zeM7b41N5cdblIZQB2lWHmiRk9opmzN6cN82oNLFpmyPInngiK3BD41VHMWEZ71jFhS9OMPagMRYjyOfiZRYzy78aG6A9%2BMpeizGLYAiJLQwGXFK3xPkKmNEVX58Svnw2Yzi9RKR%2F5CYrCsSXaQ3pjOLAEFe4yHYSkVXySGnYvCoCWw9E1CAx2%2FS6cCZdkGCevEsXCS%2B0yx5DaMkHJ8HSXPfqIbloEpw8nL%2Be%2FIBcm2PN7EeqJSdnoDfzAIJ9VNep%2BOkuE6N36B9K";
+
+const invalidCert = "about:certificate?cert=MIIH";
+
+const pem_to_der_error = "about:certificate?cert=MIIHQ";
+
+const error_parsing_cert =
+  "about:certificate?cert=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%2FXqYQkzFMBlXmqkzC%2BFdTRBYyneZw5Pz%2BXWQvL%2B74JW6LsWNc2EF0xCEqLOJuC9zjPAqbr7uroNLghGxYf13YdqbG5oj%2F4x%2BogEG3dF%2FU5YIwVr658DKyESMV6eoYV9mDVfTuJastkqcwero%2B5ZAKfYVMLUEsMwFtoTDJFmVf6JlkOWwsxp1WcQ%2FMRQK1cyqOoUFUgYylgdh3yeCDPeF22Ax8AlQxbcaI%2BGwfQL1FB7Jy%2Bh%2BKjME9lE%2FUpgV6Qt2R1xNSmvFCBWu%2BNFX6epwFP%2FJRbkMfLz0beYFUvmMgLtwVpEPSwIDAQABo4IDeTCCA3UwHwYDVR0jBBgwFoAUPdNQpdagre7zSmAKZdMh1Pj41g8wHQYDVR0OBBYEFMnCU2FmnV%2BrJfQmzQ84mqhJ6kipMCUGA1UdEQQeMByCCmdpdGh1Yi5jb22CDnd3dy5naXRodWIuY29tMA4GA1UdDwEB%2FwQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwdQYDVR0fBG4wbDA0oDKgMIYuaHR0cDovL2NybDMuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDA0oDKgMIYuaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDBLBgNVHSAERDBCMDcGCWCGSAGG%2FWwCATAqMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy5kaWdpY2VydC5jb20vQ1BTMAcGBWeBDAEBMIGIBggrBgEFBQcBAQR8MHowJAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTBSBggrBgEFBQcwAoZGaHR0cDovL2NhY2VydHMuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0U0hBMkV4dGVuZGVkVmFsaWRhdGlvblNlcnZlckNBLmNydDAMBgNVHRMBAf8EAjAAMIIBfgYKKwYBBAHWeQIEAgSCAW4EggFqAWgAdgCkuQmQtBhYFIe7E6LMZ3AKPDWYBPkb37jjd80OyA3cEAAAAWNBYm0KAAAEAwBHMEUCIQDRZp38cTWsWH2GdBpe%2FuPTWnsu%2Fm4BEC2%2BdIcvSykZYgIgCP5gGv6yzaazxBK2NwGdmmyuEFNSg2pARbMJlUFgU5UAdgBWFAaaL9fC7NP14b1Esj7HRna5vJkRXMDvlJhV1onQ3QAAAWNBYm0tAAAEAwBHMEUCIQCi7omUvYLm0b2LobtEeRAYnlIo7n6JxbYdrtYdmPUWJQIgVgw1AZ51vK9ENinBg22FPxb82TvNDO05T17hxXRC2IYAdgC72d%2B8H4pxtZOUI5eqkntHOFeVCqtS6BqQlmQ2jh7RhQAAAWNBYm3fAAAEAwBHMEUCIQChzdTKUU2N%2BXcqcK0OJYrN8EYynloVxho4yPk6Dq3EPgIgdNH5u8rC3UcslQV4B9o0a0w204omDREGKTVuEpxGeOQwDQYJKoZIhvcNAQELBQADggEBAHAPWpanWOW%2Fip2oJ5grAH8mqQfaunuCVE%2Bvac%2B88lkDK%2FLVdFgl2B6kIHZiYClzKtfczG93hWvKbST4NRNHP9LiaQqdNC17e5vNHnXVUGw%2ByxyjMLGqkgepOnZ2Rb14kcTOGp4i5AuJuuaMwXmCo7jUwPwfLe1NUlVBKqg6LK0Hcq4K0sZnxE8HFxiZ92WpV2AVWjRMEc%2F2z2shNoDvxvFUYyY1Oe67xINkmyQKc%2BygSBZzyLnXSFVWmHr3u5dcaaQGGAR42v6Ydr4iL38Hd4dOiBma%2BFXsXBIqWUjbST4VXmdaol7uzFMojA4zkxQDZAvF5XgJlAFadfySna%2Fteik%3D";
+
+async function checkForErrorSection(infoMessage, url, errorMessage, testType) {
+  info(infoMessage);
+
+  await BrowserTestUtils.withNewTab(url, async function (browser) {
+    await SpecialPowers.spawn(
+      browser,
+      [{ errorMessage, testType }],
+      async function ({ errorMessage, testType }) {
+        let errorSection;
+
+        if (testType === "invalid") {
+          await ContentTaskUtils.waitForCondition(() => {
+            return (errorSection = content.document
+              .querySelector("certificate-section")
+              .shadowRoot.querySelector("error-section"));
+          }, errorMessage);
+          ok(errorSection, errorMessage);
+        } else if (testType === "valid") {
+          ok(!errorSection, errorMessage);
+        }
+      }
+    );
+  });
+}
+
+add_task(async function test_checkForErrorSection() {
+  let itemsToTest = [
+    {
+      testType: "valid",
+      url: validCert,
+      infoMessage: "Testing for error when a valid certificate is provided.",
+      errorMessage:
+        "Error section should not be visible when URL contains a valid certificate.",
+    },
+    {
+      testType: "invalid",
+      url: invalidCert,
+      infoMessage: "Testing for error when invalid certificate is provided.",
+      errorMessage:
+        "Error section should be visible when certificate is invalid.",
+    },
+    {
+      testType: "invalid",
+      url: pem_to_der_error,
+      infoMessage: "Testing for error when PEM to DIR error occurs.",
+      errorMessage:
+        "Error section should be visible when PEM to DIR error occurs.",
+    },
+    {
+      testType: "invalid",
+      url: error_parsing_cert,
+      infoMessage: "Testing for error when parsing error occurs.",
+      errorMessage:
+        "Error section should be visible when parsing error occurs.",
+    },
+  ];
+
+  for (let i = 0; i < itemsToTest.length; i++) {
+    let item = itemsToTest[i];
+    await checkForErrorSection(
+      item.infoMessage,
+      item.url,
+      item.errorMessage,
+      item.testType
+    );
+  }
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_certificateTabLink.js b/toolkit/components/certviewer/tests/browser/browser_certificateTabLink.js
new file mode 100644
index 0000000000..9c88d2bb03
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_certificateTabLink.js
@@ -0,0 +1,61 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const validCert =
+  "about:certificate?cert=MIIGMDCCBRigAwIBAgIQCa2oS7Nau6nwv1WyRNIJnzANBgkqhkiG9w0BAQsFADBwMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMS8wLQYDVQQDEyZEaWdpQ2VydCBTSEEyIEhpZ2ggQXNzdXJhbmNlIFNlcnZlciBDQTAeFw0xOTA2MDYwMDAwMDBaFw0xOTA5MDQxMjAwMDBaMGExCzAJBgNVBAYTAlVTMQswCQYDVQQIEwJDQTETMBEGA1UEBxMKTWVubG8gUGFyazEXMBUGA1UEChMORmFjZWJvb2ssIEluYy4xFzAVBgNVBAMMDiouZmFjZWJvb2suY29tMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEEALPlfjd8gHkIMDeBOFhRt0e%2B%2F3fdm%2BZdzdM4s1WIHVbYztgmdEy20PUwDCviYKJX4GG%2BT9ivT8kJ%2FvWl1P%2FYqOCA54wggOaMB8GA1UdIwQYMBaAFFFo%2F5CvAgd1PMzZZWRiohK4WXI7MB0GA1UdDgQWBBTsQZVRTuib7KY9w3FfOYsZHvOC9zCBxwYDVR0RBIG%2FMIG8gg4qLmZhY2Vib29rLmNvbYINbWVzc2VuZ2VyLmNvbYILKi5mYmNkbi5uZXSCCCouZmIuY29tghAqLm0uZmFjZWJvb2suY29tggZmYi5jb22CDiouZmFjZWJvb2submV0gg4qLnh4LmZiY2RuLm5ldIIOKi54ei5mYmNkbi5uZXSCDyoubWVzc2VuZ2VyLmNvbYILKi5mYnNieC5jb22CDioueHkuZmJjZG4ubmV0ggxmYWNlYm9vay5jb20wDgYDVR0PAQH%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%2FBAIwADCCAQQGCisGAQQB1nkCBAIEgfUEgfIA8AB1AKS5CZC0GFgUh7sTosxncAo8NZgE%2BRvfuON3zQ7IDdwQAAABay5CAaUAAAQDAEYwRAIgMwBM6q%2BdBwu2mNtMMjTEwJZZxyoUlHUEYO%2BbfkId%2F9MCIAQ2bxhnxrapYv74fzyoTkt9m%2BELq6%2B43OVpivRVKDKTAHcAdH7agzGtMxCRIZzOJU9CcMK%2F%2FV5CIAjGNzV55hB7zFYAAAFrLkIA%2FAAABAMASDBGAiEA0x1xPWue6RMSE9nbjYBt637CRC86ixrODP%2FEIlI5mCgCIQCHNdqgOlswd0LqaW4QRii2JHN4bnoEj%2FD9j7%2BkqEB7LjANBgkqhkiG9w0BAQsFAAOCAQEAnRdIVNZ850s7IvLgg%2BU9kKxA18kLKVpIF%2FrJHkXTkymvBHKAGOFNfzqF2YxHFhkDMIuoMO2F%2BA1E0Eo8zb1atL6%2FL59broEHTOH6xFmJAlZW0h6mZg8iRJ9Ae0pTN%2FfowaoN9aFVRnVr9ccKhOdqsXYyEZ3Ze39sEwx7Uau9KhzyuJW12Jh3S%2BZJYUdBADeeJNL5ZXSUFIyjgkwSQZPaaWAzSGHZFt3sWhMjdNoBkjRJFlASLDM3m1ZWsKA47vuXvJc%2FDXT35lC1DJmyhYb9qNPR71a1hJ8TS7vUwdDd%2BdEHiJj2wQLV3m7Tn7YvWyJOEyi4n6%2FrPqT44LZmgK7HWw%3D%3D&cert=MIIEsTCCA5mgAwIBAgIQBOHnpNxc8vNtwCtCuF0VnzANBgkqhkiG9w0BAQsFADBsMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSswKQYDVQQDEyJEaWdpQ2VydCBIaWdoIEFzc3VyYW5jZSBFViBSb290IENBMB4XDTEzMTAyMjEyMDAwMFoXDTI4MTAyMjEyMDAwMFowcDELMAkGA1UEBhMCVVMxFTATBgNVBAoTDERpZ2lDZXJ0IEluYzEZMBcGA1UECxMQd3d3LmRpZ2ljZXJ0LmNvbTEvMC0GA1UEAxMmRGlnaUNlcnQgU0hBMiBIaWdoIEFzc3VyYW5jZSBTZXJ2ZXIgQ0EwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC24C%2FCJAbIbQRf1%2B8KZAayfSImZRauQkCbztyfn3YHPsMwVYcZuU%2BUDlqUH1VWtMICKq%2FQmO4LQNfE0DtyyBSe75CxEamu0si4QzrZCwvV1ZX1QK%2FIHe1NnF9Xt4ZQaJn1itrSxwUfqJfJ3KSxgoQtxq2lnMcZgqaFD15EWCo3j%2F018QsIJzJa9buLnqS9UdAn4t07QjOjBSjEuyjMmqwrIw14xnvmXnG3Sj4I%2B4G3FhahnSMSTeXXkgisdaScus0Xsh5ENWV%2FUyU50RwKmmMbGZJ0aAo3wsJSSMs5WqK24V3B3aAguCGikyZvFEohQcftbZvySC%2FzA%2FWiaJJTL17jAgMBAAGjggFJMIIBRTASBgNVHRMBAf8ECDAGAQH%2FAgEAMA4GA1UdDwEB%2FwQEAwIBhjAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwNAYIKwYBBQUHAQEEKDAmMCQGCCsGAQUFBzABhhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wSwYDVR0fBEQwQjBAoD6gPIY6aHR0cDovL2NybDQuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0SGlnaEFzc3VyYW5jZUVWUm9vdENBLmNybDA9BgNVHSAENjA0MDIGBFUdIAAwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cuZGlnaWNlcnQuY29tL0NQUzAdBgNVHQ4EFgQUUWj%2FkK8CB3U8zNllZGKiErhZcjswHwYDVR0jBBgwFoAUsT7DaQP4v0cB1JgmGggC72NkK8MwDQYJKoZIhvcNAQELBQADggEBABiKlYkD5m3fXPwdaOpKj4PWUS%2BNa0QWnqxj9dJubISZi6qBcYRb7TROsLd5kinMLYBq8I4g4Xmk%2FgNHE%2Br1hspZcX30BJZr01lYPf7TMSVcGDiEo%2Bafgv2MW5gxTs14nhr9hctJqvIni5ly%2FD6q1UEL2tU2ob8cbkdJf17ZSHwD2f2LSaCYJkJA69aSEaRkCldUxPUd1gJea6zuxICaEnL6VpPX%2F78whQYwvwt%2FTv9XBZ0k7YXDK%2FumdaisLRbvfXknsuvCnQsH6qqF0wGjIChBWUMo0oHjqvbsezt3tkBigAVBRQHvFwY%2B3sAzm2fTYS5yh%2BRp%2FBIAV0AecPUeybQ%3D&cert=MIIDxTCCAq2gAwIBAgIQAqxcJmoLQJuPC3nyrkYldzANBgkqhkiG9w0BAQUFADBsMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSswKQYDVQQDEyJEaWdpQ2VydCBIaWdoIEFzc3VyYW5jZSBFViBSb290IENBMB4XDTA2MTExMDAwMDAwMFoXDTMxMTExMDAwMDAwMFowbDELMAkGA1UEBhMCVVMxFTATBgNVBAoTDERpZ2lDZXJ0IEluYzEZMBcGA1UECxMQd3d3LmRpZ2ljZXJ0LmNvbTErMCkGA1UEAxMiRGlnaUNlcnQgSGlnaCBBc3N1cmFuY2UgRVYgUm9vdCBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMbM5XPm%2B9S75S0tMqbf5YE%2Fyc0lSbZxKsPVlDRnogocsF9ppkCxxLeyj9CYpKlBWTrT3JTWPNt0OKRKzE0lgvdKpVMSOO7zSW1xkX5jtqumX8OkhPhPYlG%2B%2BMXs2ziS4wblCJEMxChBVfvLWokVfnHoNb9Ncgk9vjo4UFt3MRuNs8ckRZqnrG0AFFoEt7oT61EKmEFBIk5lYYeBQVCmeVyJ3hlKV9Uu5l0cUyx%2BmM0aBhakaHPQNAQTXKFx01p8VdteZOE3hzBWBOURtCmAEvF5OYiiAhF8J2a3iLd48soKqDirCmTCv2ZdlYTBoSUeh10aUAsgEsxBu24LUTi4S8sCAwEAAaNjMGEwDgYDVR0PAQH%2FBAQDAgGGMA8GA1UdEwEB%2FwQFMAMBAf8wHQYDVR0OBBYEFLE%2Bw2kD%2BL9HAdSYJhoIAu9jZCvDMB8GA1UdIwQYMBaAFLE%2Bw2kD%2BL9HAdSYJhoIAu9jZCvDMA0GCSqGSIb3DQEBBQUAA4IBAQAcGgaX3NecnzyIZgYIVyHbIUf4KmeqvxgydkAQV8GK83rZEWWONfqe%2FEW1ntlMMUu4kehDLI6zeM7b41N5cdblIZQB2lWHmiRk9opmzN6cN82oNLFpmyPInngiK3BD41VHMWEZ71jFhS9OMPagMRYjyOfiZRYzy78aG6A9%2BMpeizGLYAiJLQwGXFK3xPkKmNEVX58Svnw2Yzi9RKR%2F5CYrCsSXaQ3pjOLAEFe4yHYSkVXySGnYvCoCWw9E1CAx2%2FS6cCZdkGCevEsXCS%2B0yx5DaMkHJ8HSXPfqIbloEpw8nL%2Be%2FIBcm2PN7EeqJSdnoDfzAIJ9VNep%2BOkuE6N36B9K";
+
+add_task(async function test_certificateTabLink() {
+  await BrowserTestUtils.openNewForegroundTab(gBrowser, () => {
+    gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser, validCert);
+  });
+
+  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], async function () {
+    let certificateTabs;
+    await ContentTaskUtils.waitForCondition(() => {
+      certificateTabs = content.document
+        .querySelector("certificate-section")
+        .shadowRoot.querySelectorAll(".certificate-tab");
+      return certificateTabs.length;
+    }, "Found certificate tabs.");
+
+    ok(certificateTabs.length, "Certificate tabs should exist.");
+
+    let issuerNameGroups = content.document
+      .querySelector("certificate-section")
+      .shadowRoot.querySelectorAll(".issuer-name");
+    let issuerNames = [];
+    for (let i = 0; i < issuerNameGroups.length; i++) {
+      issuerNames.push(
+        issuerNameGroups[i].shadowRoot.querySelector(".common-name")
+      );
+    }
+
+    for (let i = 0; i < issuerNames.length; i++) {
+      if (i < issuerNames.length - 1) {
+        issuerNames[i].shadowRoot.querySelector("a").click();
+        await ContentTaskUtils.waitForCondition(() => {
+          return certificateTabs[i + 1].classList.contains("selected");
+        }, "Clicking link should select new tab.");
+        ok(
+          certificateTabs[i + 1].classList.contains("selected"),
+          "Clicking link should select new tab."
+        );
+      } else {
+        await ContentTaskUtils.waitForCondition(() => {
+          return certificateTabs[i].classList.contains("selected");
+        }, "Clicking link should select new tab.");
+        ok(
+          certificateTabs[i].classList.contains("selected"),
+          "Clicking link should select new tab."
+        );
+        ok(
+          !issuerNames[i].shadowRoot.querySelector("a"),
+          "Final tab's issuer name should not be link."
+        );
+      }
+    }
+  });
+  gBrowser.removeCurrentTab(); // closes about:certificate
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_checkAuthorityKeyID.js b/toolkit/components/certviewer/tests/browser/browser_checkAuthorityKeyID.js
new file mode 100644
index 0000000000..a923f7acb3
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_checkAuthorityKeyID.js
@@ -0,0 +1,50 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+async function checkAuthorityKeyID(url, expectedKeyId) {
+  await BrowserTestUtils.withNewTab(url, async function (browser) {
+    await SpecialPowers.spawn(
+      browser,
+      [expectedKeyId],
+      async function (expectedKeyId) {
+        let certificateSection = await ContentTaskUtils.waitForCondition(() => {
+          return content.document.querySelector("certificate-section");
+        }, "Certificate section found");
+        let authorityKeySection =
+          certificateSection.shadowRoot.querySelector(".authority-key-id");
+        let subjectNameSection =
+          certificateSection.shadowRoot.querySelector(".subject-name");
+        if (!expectedKeyId) {
+          Assert.equal(authorityKeySection, null, "authorityKeySection found");
+          Assert.ok(subjectNameSection, "subjectNameSection found");
+          return;
+        }
+        Assert.ok(authorityKeySection, "authorityKeySection found");
+        let item = authorityKeySection.shadowRoot.querySelector("info-item");
+        Assert.ok(item, "item found");
+        let info = item.shadowRoot.querySelector(".info").textContent;
+        Assert.equal(info, expectedKeyId, "Key IDs must be equal");
+      }
+    );
+  });
+}
+
+add_task(async function test() {
+  let tests = [
+    {
+      url: "about:certificate?cert=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%2FXqYQkzFMBlXmqkzC%2BFdTRBYyneZw5Pz%2BXWQvL%2B74JW6LsWNc2EF0xCEqLOJuC9zjPAqbr7uroNLghGxYf13YdqbG5oj%2F4x%2BogEG3dF%2FU5YIwVr658DKyESMV6eoYV9mDVfTuJastkqcwero%2B5ZAKfYVMLUEsMwFtoTDJFmVf6JlkOWwsxp1WcQ%2FMRQK1cyqOoUFUgYylgdh3yeCDPeF22Ax8AlQxbcaI%2BGwfQL1FB7Jy%2Bh%2BKjME9lE%2FUpgV6Qt2R1xNSmvFCBWu%2BNFX6epwFP%2FJRbkMfLz0beYFUvmMgLtwVpEPSwIDAQABo4IDeTCCA3UwHwYDVR0jBBgwFoAUPdNQpdagre7zSmAKZdMh1Pj41g8wHQYDVR0OBBYEFMnCU2FmnV%2BrJfQmzQ84mqhJ6kipMCUGA1UdEQQeMByCCmdpdGh1Yi5jb22CDnd3dy5naXRodWIuY29tMA4GA1UdDwEB%2FwQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwdQYDVR0fBG4wbDA0oDKgMIYuaHR0cDovL2NybDMuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDA0oDKgMIYuaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDBLBgNVHSAERDBCMDcGCWCGSAGG%2FWwCATAqMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy5kaWdpY2VydC5jb20vQ1BTMAcGBWeBDAEBMIGIBggrBgEFBQcBAQR8MHowJAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTBSBggrBgEFBQcwAoZGaHR0cDovL2NhY2VydHMuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0U0hBMkV4dGVuZGVkVmFsaWRhdGlvblNlcnZlckNBLmNydDAMBgNVHRMBAf8EAjAAMIIBfgYKKwYBBAHWeQIEAgSCAW4EggFqAWgAdgCkuQmQtBhYFIe7E6LMZ3AKPDWYBPkb37jjd80OyA3cEAAAAWNBYm0KAAAEAwBHMEUCIQDRZp38cTWsWH2GdBpe%2FuPTWnsu%2Fm4BEC2%2BdIcvSykZYgIgCP5gGv6yzaazxBK2NwGdmmyuEFNSg2pARbMJlUFgU5UAdgBWFAaaL9fC7NP14b1Esj7HRna5vJkRXMDvlJhV1onQ3QAAAWNBYm0tAAAEAwBHMEUCIQCi7omUvYLm0b2LobtEeRAYnlIo7n6JxbYdrtYdmPUWJQIgVgw1AZ51vK9ENinBg22FPxb82TvNDO05T17hxXRC2IYAdgC72d%2B8H4pxtZOUI5eqkntHOFeVCqtS6BqQlmQ2jh7RhQAAAWNBYm3fAAAEAwBHMEUCIQChzdTKUU2N%2BXcqcK0OJYrN8EYynloVxho4yPk6Dq3EPgIgdNH5u8rC3UcslQV4B9o0a0w204omDREGKTVuEpxGeOQwDQYJKoZIhvcNAQELBQADggEBAHAPWpanWOW%2Fip2oJ5grAH8mqQfaunuCVE%2Bvac%2B88lkDK%2FLVdFgl2B6kIHZiYClzKtfczG93hWvKbST4NRNHP9LiaQqdNC17e5vNHnXVUGw%2ByxyjMLGqkgepOnZ2Rb14kcTOGp4i5AuJuuaMwXmCo7jUwPwfLe1NUlVBKqg6LK0Hcq4K0sZnxE8HFxiZ92WpV2AVWjRMEc%2F2z2shNoDvxvFUYyY1Oe67xINkmyQKc%2BygSBZzyLnXSFVWmHr3u5dcaaQGGAR42v6Ydr4iL38Hd4dOiBma%2BFXsXBIqWUjbST4VXmdaol7uzFMojA4zkxQDZAvF5XgJlAFadfySna%2Fteik%3D",
+      expectedKeyId:
+        "3D:D3:50:A5:D6:A0:AD:EE:F3:4A:60:0A:65:D3:21:D4:F8:F8:D6:0F",
+    },
+    {
+      url: "about:certificate?cert=MIIGdjCCBF6gAwIBAgIBJjANBgkqhkiG9w0BAQsFADB0MQswCQYDVQQGEwJKRTEPMA0GA1UECAwGSmVyc2V5MRUwEwYDVQQKDAx0Z2hvc3QuY28udWsxFTATBgNVBAMMDHRnaG9zdC5jby51azEmMCQGCSqGSIb3DQEJARYXcG9zdG1hc3RlckB0Z2hvc3QuY28udWswHhcNMTkxMTE4MjE1NjAwWhcNMjAxMTE3MjE1NjAwWjBRMQswCQYDVQQGEwJKRTEPMA0GA1UECAwGSmVyc2V5MRUwEwYDVQQKDAx0Z2hvc3QuY28udWsxGjAYBgNVBAMMEW1haWwudGdob3N0LmNvLnVrMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA0CS0dR6hyjv4o6s4%2FI2VT43DCfylcaq%2F6%2B5tUn6xMDtf0tYMXPjG%2FGjtlXQk2Jq7wa%2FlRR%2Fzs8c6037BZ7wzu8Wx2i6tvRLZZSlzM2mRHxaRRDYTeHyovanhCFzKqnvi30bxKugQ3lETBK5eP7ppVpcHz58lx%2B%2BFovPOBx6SRaz4EiceUybZwFpKxUJmlhivT2MJTKM5NHF4n27vszM0dyu2qXLzhpy5dgklMEEhdnHFCT%2F9YPN7uLCvzJnCo9N%2FeWf84odJ%2FjTiEKm5NG6SGDuOZ%2FbY9KwQ8nAk26zeTkw%2BMfMXD2Rl76ZFg%2B07bpckSTiaCtLGGhbgLrqEdgNGTpz1Pu3uFjhR4QsfUsDAaSvgns0PT6eSA152cgOtin2SYo%2B4UVjVdM5d%2ByB0JgEIGHmiCRQkDdCD9%2FNZBhrnG2Xwooe64QzD5OjNS8yQSCPvjfivbSk1ulcIGjgxC0z1Ot4hc%2ByuU8aRE0ekIOf5EUEjZfJ%2FnO4EXT3J5en0CYurswJM7miOsVEiO1OIut022T00MoAF%2F%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%2BEIBAQQEAwIE8DAcBgNVHREEFTATghFtYWlsLnRnaG9zdC5jby51azANBgkqhkiG9w0BAQsFAAOCAgEAKZC9pqgU9MPssbNeJhKeGcCoH49BhfhrJNPkWqlJ%2FVbUB32m8p%2F7exaqFEe%2Fk2YwV8ILMA%2FCvQLgeV36Y9rHcWKqaA8lrklhRkK6%2BfYkAkpw37vVbm8qWsTt4OMa0Ajh%2F7QBy%2FUqak8Gaarl3LkJKLKB3Pj%2Bd2BFNxNm5W3TeFia2s%2B5y0O0eKqSQwRPqlQo3qhNQU1fDimTq8yI3fH9AOByWXHePjSc5h45GHxWoXPqQKtuqCINou6pKeZa1KoTCefB2oYJqamkneL2%2B21JhwkSVkGUfseGc2hiROVLejc%2Fgzq7mpUqudOsyN672BwB6W81w6%2FHCt2cZmCTWAAT5E3b6bHqqTTn9O2uljx2zTxao5Xov4L9EZ3hdccsLJGXHYgGDqY33e6Rrf86Jc%2BV%2F4%2FL8vhGf%2B70ASKLkibUuGwFJ0%2BamQHoHnVXLZ5rnbV3ArXOQcsfegTifmEPn7pGyHm7r5%2BkJ2JIh8wCyl5B%2FUxvNwIfAFEiieU3aqRAgbjnezYXwoLoLJBKSRMXdIfZJldduIkoPaeO0zWWaJSMon3qTAeDuboM4EfYG9Ma3UWdznXVkmgiXFo%2Fz6k%2Bg4jNzaQknI8jNHbp9G5K7M9KPcvUja8hjeGG4RIULKDdkauZUe1hX6m3NrzrJLD3MJPD8YTFeAf%2Fe3HCGwl4stKWHg4%3D&cert=MIIFZDCCA0wCCQDHjYswunE2mzANBgkqhkiG9w0BAQsFADB0MQswCQYDVQQGEwJKRTEPMA0GA1UECAwGSmVyc2V5MRUwEwYDVQQKDAx0Z2hvc3QuY28udWsxFTATBgNVBAMMDHRnaG9zdC5jby51azEmMCQGCSqGSIb3DQEJARYXcG9zdG1hc3RlckB0Z2hvc3QuY28udWswHhcNMTgwNDA4MTIyMjU0WhcNMjMwNDA4MTIyMjU0WjB0MQswCQYDVQQGEwJKRTEPMA0GA1UECAwGSmVyc2V5MRUwEwYDVQQKDAx0Z2hvc3QuY28udWsxFTATBgNVBAMMDHRnaG9zdC5jby51azEmMCQGCSqGSIb3DQEJARYXcG9zdG1hc3RlckB0Z2hvc3QuY28udWswggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCoFbHy44GNOQSymk%2BwAmZmllcAATSM6DrsW7NZgX8vHeP5OAlRaGaOgVmozKcbKSB2KSIvDvY1%2BKEKtfr5meIaeA6r%2BILeUYuNxQomnW3Oy%2B%2B7RFE53pS7R7QIt%2FLVf3k60mdZDLXF1wyFv950noGNrFZfvBvND1%2F88JeC4Gt7dVnJMy9CXOr7V0O%2F7sa5z%2Bvfm2Acufd1RYA3W%2FECbt%2F6z8KV%2FQthAgcYoabQgkmh8AxQ5cG7tBmoEAs%2BNwU%2BR8eMq1f%2B6TBCJiMa07jA1%2BQ663d7YONlk4fTSmvo3lEhXtrR%2BmrkxZAMiAD6NJs3VakcuAED9e1dS3G3%2FmPcNrKsa73aXEC5uvL9y4mKCZLypuSYjlW8cP5JpCG6vtmwL%2FATbcCtwpDwrKLcRWCrZdX0FOJirjWfKL%2BhyIWayQ5u7awdhH430h8rj03fXSMBhtTn73rohSGIANBnqVftvDDPnEQb5p17giaVbJybfA2tdMvJTZg6pEAx9%2B3zHXRECFpWOtaJDjWbmIExPMgiCSFkBPP3MEDVb7VdHKZs0CvBQg6GmpXg9M4OHZylzS6PXXO8qBCtBdKOwdFSZWbeD9E652rkvb5FuQ8laGHcxgMc2YFlVZaqVowXEkVkkld12d4sBipeRpDWNjA2kLfeUmwsXWtugG8c8Jm9IoZY8oeUkwIDAQABMA0GCSqGSIb3DQEBCwUAA4ICAQCVj6R9C5pE9hkBx7CCr9l4TLoolaEZlKngJHBRRSy5U50MndQ24Jeis2OTxEeYX7DJ%2BOy6QZdaph6FLwALxUWPfQavBcgauKR%2FCdqLQxZc267TMFkRIZvOtHUJ4obJ5qvQAWzNnmRq18b5plznfBfn9b3F2AmHgfsNX6WryQ4geR786VObcUhKTaofcaX%2FE4J9AVzL864fJ%2FDB%2FPSqhYrtskiG6PT9Ngu20ejvgAVk5aJ%2F%2F5Swsjyg6EBl%2BdwJepq2xzI313ZkwCg2pp6oqLDlxf%2Fh585Bsqke39Ax%2B42NWNM14cethcJ7jgyZoEaL3T%2BQ3O%2Bj9XEe5FbvkKtSgMIA6f0FneA4vbF8%2FECPMEi7k3k04gU1gZSR%2FGA63GPEK%2FCLqeh%2BYVgBGKDPinnMEV%2FuBrTUDQFBlDEHlELk7F9o93lxQNs6WOGQSfybfHhySla3nqoYV2phyeZZsJ%2BxMovWWIydJhVN%2F37v0fYTZhnlquGenXHvC5MHrMq2vjUY0Uy637AzXWVNWveNyQmmn9tL4jygELHQu%2Bint4GRybH7rThcslv63D5s4zZza7cITIFjmqZ%2BPrTSVKL%2BlnQLjEMpSdfB86Y2JnMimaOyv%2BbZp1QMB5fYh0PTsjYATi9We%2BDFD42c5H7Su0vFAwCTP11AiKzfbj2oBKVVwwJj3FmkYQ%3D%3D",
+      expectedKeyId: false,
+    },
+  ];
+
+  for (let test of tests) {
+    await checkAuthorityKeyID(test.url, test.expectedKeyId);
+  }
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_checkLongHex.js b/toolkit/components/certviewer/tests/browser/browser_checkLongHex.js
new file mode 100644
index 0000000000..01b54c083b
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_checkLongHex.js
@@ -0,0 +1,38 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+async function checkLongHex(url, itemClass) {
+  await BrowserTestUtils.withNewTab(url, async function (browser) {
+    await SpecialPowers.spawn(browser, [itemClass], async function (itemClass) {
+      let certificateSection = await ContentTaskUtils.waitForCondition(() => {
+        return content.document.querySelector("certificate-section");
+      }, "Certificate section found");
+      let publicKeyInfoSection =
+        certificateSection.shadowRoot.querySelector(".public-key-info");
+      Assert.ok(publicKeyInfoSection, "publicKeyInfoSection found");
+
+      let item = publicKeyInfoSection.shadowRoot.querySelector(`.${itemClass}`);
+      Assert.ok(item, `item ${itemClass} found`);
+
+      let longHex = item.shadowRoot.querySelector(".long-hex");
+      Assert.ok(longHex, "longHex class name found");
+    });
+  });
+}
+
+add_task(async function test() {
+  let tests = [
+    {
+      url: "about:certificate?cert=MIIHQjCCBiqgAwIBAgIQCgYwQn9bvO1pVzllk7ZFHzANBgkqhkiG9w0BAQsFADB1MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMTQwMgYDVQQDEytEaWdpQ2VydCBTSEEyIEV4dGVuZGVkIFZhbGlkYXRpb24gU2VydmVyIENBMB4XDTE4MDUwODAwMDAwMFoXDTIwMDYwMzEyMDAwMFowgccxHTAbBgNVBA8MFFByaXZhdGUgT3JnYW5pemF0aW9uMRMwEQYLKwYBBAGCNzwCAQMTAlVTMRkwFwYLKwYBBAGCNzwCAQITCERlbGF3YXJlMRAwDgYDVQQFEwc1MTU3NTUwMQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNU2FuIEZyYW5jaXNjbzEVMBMGA1UEChMMR2l0SHViLCBJbmMuMRMwEQYDVQQDEwpnaXRodWIuY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxjyq8jyXDDrBTyitcnB90865tWBzpHSbindG%2FXqYQkzFMBlXmqkzC%2BFdTRBYyneZw5Pz%2BXWQvL%2B74JW6LsWNc2EF0xCEqLOJuC9zjPAqbr7uroNLghGxYf13YdqbG5oj%2F4x%2BogEG3dF%2FU5YIwVr658DKyESMV6eoYV9mDVfTuJastkqcwero%2B5ZAKfYVMLUEsMwFtoTDJFmVf6JlkOWwsxp1WcQ%2FMRQK1cyqOoUFUgYylgdh3yeCDPeF22Ax8AlQxbcaI%2BGwfQL1FB7Jy%2Bh%2BKjME9lE%2FUpgV6Qt2R1xNSmvFCBWu%2BNFX6epwFP%2FJRbkMfLz0beYFUvmMgLtwVpEPSwIDAQABo4IDeTCCA3UwHwYDVR0jBBgwFoAUPdNQpdagre7zSmAKZdMh1Pj41g8wHQYDVR0OBBYEFMnCU2FmnV%2BrJfQmzQ84mqhJ6kipMCUGA1UdEQQeMByCCmdpdGh1Yi5jb22CDnd3dy5naXRodWIuY29tMA4GA1UdDwEB%2FwQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwdQYDVR0fBG4wbDA0oDKgMIYuaHR0cDovL2NybDMuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDA0oDKgMIYuaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDBLBgNVHSAERDBCMDcGCWCGSAGG%2FWwCATAqMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy5kaWdpY2VydC5jb20vQ1BTMAcGBWeBDAEBMIGIBggrBgEFBQcBAQR8MHowJAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTBSBggrBgEFBQcwAoZGaHR0cDovL2NhY2VydHMuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0U0hBMkV4dGVuZGVkVmFsaWRhdGlvblNlcnZlckNBLmNydDAMBgNVHRMBAf8EAjAAMIIBfgYKKwYBBAHWeQIEAgSCAW4EggFqAWgAdgCkuQmQtBhYFIe7E6LMZ3AKPDWYBPkb37jjd80OyA3cEAAAAWNBYm0KAAAEAwBHMEUCIQDRZp38cTWsWH2GdBpe%2FuPTWnsu%2Fm4BEC2%2BdIcvSykZYgIgCP5gGv6yzaazxBK2NwGdmmyuEFNSg2pARbMJlUFgU5UAdgBWFAaaL9fC7NP14b1Esj7HRna5vJkRXMDvlJhV1onQ3QAAAWNBYm0tAAAEAwBHMEUCIQCi7omUvYLm0b2LobtEeRAYnlIo7n6JxbYdrtYdmPUWJQIgVgw1AZ51vK9ENinBg22FPxb82TvNDO05T17hxXRC2IYAdgC72d%2B8H4pxtZOUI5eqkntHOFeVCqtS6BqQlmQ2jh7RhQAAAWNBYm3fAAAEAwBHMEUCIQChzdTKUU2N%2BXcqcK0OJYrN8EYynloVxho4yPk6Dq3EPgIgdNH5u8rC3UcslQV4B9o0a0w204omDREGKTVuEpxGeOQwDQYJKoZIhvcNAQELBQADggEBAHAPWpanWOW%2Fip2oJ5grAH8mqQfaunuCVE%2Bvac%2B88lkDK%2FLVdFgl2B6kIHZiYClzKtfczG93hWvKbST4NRNHP9LiaQqdNC17e5vNHnXVUGw%2ByxyjMLGqkgepOnZ2Rb14kcTOGp4i5AuJuuaMwXmCo7jUwPwfLe1NUlVBKqg6LK0Hcq4K0sZnxE8HFxiZ92WpV2AVWjRMEc%2F2z2shNoDvxvFUYyY1Oe67xINkmyQKc%2BygSBZzyLnXSFVWmHr3u5dcaaQGGAR42v6Ydr4iL38Hd4dOiBma%2BFXsXBIqWUjbST4VXmdaol7uzFMojA4zkxQDZAvF5XgJlAFadfySna%2Fteik%3D",
+      itemClass: "modulus",
+    },
+    {
+      url: "about:certificate?cert=MIIIMTCCBxmgAwIBAgIMFkDF1F0uxNlMfXxqMA0GCSqGSIb3DQEBCwUAMGYxCzAJBgNVBAYTAkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTwwOgYDVQQDEzNHbG9iYWxTaWduIE9yZ2FuaXphdGlvbiBWYWxpZGF0aW9uIENBIC0gU0hBMjU2IC0gRzIwHhcNMTgxMTA4MjEyMTA0WhcNMTkxMTIyMDc1OTU5WjB5MQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNU2FuIEZyYW5jaXNjbzEjMCEGA1UEChMaV2lraW1lZGlhIEZvdW5kYXRpb24sIEluYy4xGDAWBgNVBAMMDyoud2lraXBlZGlhLm9yZzBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABGd1rS7GauMxJ15BmViShjVMjwQJNjjw%2BOUhnIaqE5QF%2Fq6c%2FLIvVh4N3473a7J52JcfmlfCrXvDthHzaZNEneKjggWVMIIFkTAOBgNVHQ8BAf8EBAMCA4gwgaAGCCsGAQUFBwEBBIGTMIGQME0GCCsGAQUFBzAChkFodHRwOi8vc2VjdXJlLmdsb2JhbHNpZ24uY29tL2NhY2VydC9nc29yZ2FuaXphdGlvbnZhbHNoYTJnMnIxLmNydDA%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%2BRvfuON3zQ7IDdwQAAABZvUzN%2FYAAAQDAEcwRQIgBATdvSzbd5NwGdtkmJ5SEvEPn6A8hgAsk6GSP6hzWcgCIQDKfHQNtObs%2FhHPfLgXsVkcnHIbjlNwmWeiukGtGHZFMgB2AG9Tdqwx8DEZ2JkApFEV%2F3cVHBHZAsEAKQaNsgiaN9kTAAABZvUzN8cAAAQDAEcwRQIgYalEnXtd%2FfPhjq9SXPoSPRhaMmeDs0IMN5o5Y6QTKfUCIQClR1uj%2BB56K4tGh%2Fmws4qugG1qSD9zfvmx8roKik3HHDANBgkqhkiG9w0BAQsFAAOCAQEAUEJyg%2FAZo%2BowG5J%2FLIk8EIDnyOcanmfgvdjMg8KnpBvh8l3Wb4HmOudluJhIeIbCUMwzEzSGqYQQ78n4wtjLaLwaDgL4WzHOVec2k%2BrbfmPT6MUCtdlz1PK5%2FWY9JQyQq6vy%2Btm3a6Wijy6M8U%2FTdrJubK5X03SFfRb0pDuFdr2fnkctLRnyCb1w0XHwGXjEcGm1LY42YKwdvbj3WIqumeSEuG4MZtquW6NURKELSil03G%2FhRHRAHHGx3zXes%2FjJcpH2GPX9eY9B%2BR1oHmCE2QF5Y%2FBh%2BuNA2%2B2Iuj%2F6UJAOw%2FZ%2F8%2BqZcnLWWnK2Dwzc34C%2FAUD%2BWb71oUcr60%2BpPg%3D%3D&cert=MIIEYjCCA0qgAwIBAgILBAAAAAABMYnGRMkwDQYJKoZIhvcNAQELBQAwTDEgMB4GA1UECxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjMxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMTCkdsb2JhbFNpZ24wHhcNMTEwODAyMTAwMDAwWhcNMjIwODAyMTAwMDAwWjBmMQswCQYDVQQGEwJCRTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTE8MDoGA1UEAxMzR2xvYmFsU2lnbiBPcmdhbml6YXRpb24gVmFsaWRhdGlvbiBDQSAtIFNIQTI1NiAtIEcyMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxw5sPyOTf8xwpZ0gww5TP37ATsKYScpH1SPvAzSFdMijAi5GXAt9yYidT4vw%2BJxsjFU127%2Fys%2Br741bnSkbZEyLKNtWbwajjlkOT8gy85vnm6JnIY0h4f1c2aRoZHVrR1H3CnNR%2F4YASrnrqiOpX2MoKCjoSSaJiGXoNJPc367RzknsFI5sStc7rKd%2BkFAK5AaXUppxDZIje%2BH7%2B4%2FUe5f7co6jkZjHZTCXpGLmJWQmu6Z0cbTcPSh41ICjir9QhiwHERa1uK2OrkmthCk0g7XO6fM7%2BFrXbn4Dw1ots2Qh5Sk94ZdqSvL41%2BbPE%2BSeATv%2BWUuYCIOEHc%2BldK72y8QIDAQABo4IBKTCCASUwDgYDVR0PAQH%2FBAQDAgEGMBIGA1UdEwEB%2FwQIMAYBAf8CAQAwHQYDVR0OBBYEFJbeYfG9HBYpUxzAzH07gwBA5hp8MEcGA1UdIARAMD4wPAYEVR0gADA0MDIGCCsGAQUFBwIBFiZodHRwczovL3d3dy5nbG9iYWxzaWduLmNvbS9yZXBvc2l0b3J5LzA2BgNVHR8ELzAtMCugKaAnhiVodHRwOi8vY3JsLmdsb2JhbHNpZ24ubmV0L3Jvb3QtcjMuY3JsMD4GCCsGAQUFBwEBBDIwMDAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AyLmdsb2JhbHNpZ24uY29tL3Jvb3RyMzAfBgNVHSMEGDAWgBSP8Et%2FqC5FJK5NUPpjmove4t0bvDANBgkqhkiG9w0BAQsFAAOCAQEAugYpwLQZjCERwJQRnrs91NVDQPafuyULI2i1Gvf6VGTMKxP5IfBEreHoFVjb7v3bok3MGI8Nmm3DawGhMfCNvABAzDlfh2FRbfSV6uoVNT5AhcBi1aE0%2FniqqLJaOfM3Qfuc6D5xSlvr%2BGlYoeDGk3fpumeS62VYkHBzQn2v9CMmeReq%2BqS7meVEb2WB58rrVcj0ticRIXSUvGu3dGIpxM2uR%2FLmQlt4hgVhy5CqeYnfBH6xJnBLjUAfhHvA%2BwfmyLdOkfQ1A%2B3o60EQF0m0YsinLPLhTI8DLPMWN11n8aQ5eUmjwF3MVfkhgA%2F7zuIpalhQ6abX6xwyNrVip8H65g%3D%3D&cert=MIIDXzCCAkegAwIBAgILBAAAAAABIVhTCKIwDQYJKoZIhvcNAQELBQAwTDEgMB4GA1UECxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjMxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMTCkdsb2JhbFNpZ24wHhcNMDkwMzE4MTAwMDAwWhcNMjkwMzE4MTAwMDAwWjBMMSAwHgYDVQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UEAxMKR2xvYmFsU2lnbjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMwldpB5BngiFvXAg7aEyiie%2FQV2EcWtiHL8RgJDx7KKnQRfJMsuS%2BFggkbhUqsMgUdwbN1k0ev1LKMPgj0MK66X17YUhhB5uzsTgHeMCOFJ0mpiLx9e%2BpZo34knlTifBtc%2BycsmWQ1z3rDI6SYOgxXG71uL0gRgykmmKPZpO%2FbLyCiR5Z2KYVc3rHQU3HTgOu5yLy6c%2B9C7v%2FU9AOEGM%2BiCK65TpjoWc4zdQQ4gOsC0p6Hpsk%2BQLjJg6VfLuQSSaGjlOCZgdbKfd%2F%2BRFO%2BuIEn8rUAVSNECMWEZXriX7613t2Saer9fwRPvm2L7DWzgVGkWqQPabumDk3F2xmmFghcCAwEAAaNCMEAwDgYDVR0PAQH%2FBAQDAgEGMA8GA1UdEwEB%2FwQFMAMBAf8wHQYDVR0OBBYEFI%2FwS3%2BoLkUkrk1Q%2BmOai97i3Ru8MA0GCSqGSIb3DQEBCwUAA4IBAQBLQNvAUKr%2ByAzv95ZURUm7lgAJQayzE4aGKAczymvmdLm6AC2upArT9fHxD4q%2Fc2dKg8dEe3jgr25sbwMpjjM5RcOO5LlXbKr8EpbsU8Yt5CRsuZRj%2B9xTaGdWPoO4zzUhw8lo%2Fs7awlOqzJCK6fBdRoyV3XpYKBovHd7NADdBj%2B1EbddTKJd%2B82cEHhXXipa0095MJ6RMG3NzdvQXmcIfeg7jLQitChws%2FzyrVQ4PkX4268NXSb7hLi18YIvDQVETI53O9zJrlAGomecsMx86OyXShkDOOyyGeMlhLxS67ttVb9%2BE7gUJTb0o2HLO02JQZR7rkpeDMdmztcpHWD9f",
+      itemClass: "public-value",
+    },
+  ];
+
+  for (let test of tests) {
+    await checkLongHex(test.url, test.itemClass);
+  }
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_checkMissingCommonName.js b/toolkit/components/certviewer/tests/browser/browser_checkMissingCommonName.js
new file mode 100644
index 0000000000..e26612c1b8
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_checkMissingCommonName.js
@@ -0,0 +1,50 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function test_check_missing_common_name() {
+  const kURL =
+    "about:certificate?cert=MIIHVDCCBTygAwIBAgIQOBNAgEopyUI1DYLsLmSWejANBgkqhkiG9w0BAQsFADBYMQswCQYDVQQGEwJUVzESMBAGA1UECgwJ6KGM5pS%2F6ZmiMTUwMwYDVQQDDCzmlL%2FlupzkvLrmnI3lmajmlbjkvY3mhpHorYnnrqHnkIbkuK3lv4MgLSBHMTAeFw0yMDAxMjAwNjExMzBaFw0yMjAxMjAwNjExMzBaMFUxCzAJBgNVBAYTAlRXMQ8wDQYDVQQHDAboh7rngaMxEjAQBgNVBAoMCee4vee1seW6nDEhMB8GA1UEAwwYZW5nbGlzaC5wcmVzaWRlbnQuZ292LnR3MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyxCtEdUsGqr%2FVCNOMpj1TkDzBn6Gs1RBHHERU%2BsJ1q3ri6rJfydTx0rQKUbcGEMyWB2pga4dNSjzxQZ6%2BebP3kctC0H%2F%2BptEnsIOQcyD2yLN5yg8ejx6Y568z3fbU%2FRAVo4q6qGZzlBfzl2AhZMrp3AiNpQZXjLWgNHYZfirDVur7ImSjECq6atLlZ1yn%2B0RC%2FsGsPKalz5iacuxMYIkWeCvm7piA%2FdXPfw%2FVJxbIEkXMSXXxDNGrBZY0wAcmPeDHZxyLDGDOFLV%2Fpics3ZJ4UjFPphwaXuW94K9NKLcfOu7JaYP6JszpBIEiL8GRl8pMdykkKN%2FRkEZ%2F8pE7Tz%2BswIDAQABo4IDGzCCAxcwHwYDVR0jBBgwFoAU1ustnWH%2BK7twiC64B7FZsPSDImowHQYDVR0OBBYEFDxkjGSuIgKbFKTUvadNfX%2B%2BogdCMHUGCCsGAQUFBwEBBGkwZzA1BggrBgEFBQcwAoYpaHR0cDovL2d0bHNjYS5uYXQuZ292LnR3L0NlcnRzL0dUTFNDQS5jcnQwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmd0bHNjYS5uYXQuZ292LnR3L09DU1AwIgYDVR0gBBswGTANBgsrBgEEAYG3I2QAAzAIBgZngQwBAgIwIAYDVR0lAQH%2FBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMCMGA1UdEQQcMBqCGGVuZ2xpc2gucHJlc2lkZW50Lmdvdi50dzAgBgNVHQkEGTAXMBUGB2CGdgFkAgExCgYIYIZ2AWQDAwEwQQYDVR0fBDowODA2oDSgMoYwaHR0cDovL2d0bHNjYS5uYXQuZ292LnR3L2NybC9HVExTQ0EtY29tcGxldGUuY3JsMA4GA1UdDwEB%2FwQEAwIFoDCCAXwGCisGAQQB1nkCBAIEggFsBIIBaAFmAHUApLkJkLQYWBSHuxOizGdwCjw1mAT5G9%2B443fNDsgN3BAAAAFvwZRvQAAABAMARjBEAiAWcMYq5U%2BiRndzk4q7XRQ10ykv%2FBlaHelk0SMi8LeXmAIgY%2BJUd3bzT5nSTCYQMOAMLGE52UWhnIRgxdWRtcg60uAAdQDuS723dc5guuFCaR%2Br4Z5mow9%2BX7By2IMAxHuJeqj9ywAAAW%2FBlHdGAAAEAwBGMEQCIAM72FPgBC6JzvE%2BEkvdp9g9Lt19fnJ6KfWQYNN%2BMylsAiBezZw%2FDzsg22O4Tr0QGYoY7HsnPzsHzxEJVUJGl8HXZQB2AG9Tdqwx8DEZ2JkApFEV%2F3cVHBHZAsEAKQaNsgiaN9kTAAABb8GUfQAAAAQDAEcwRQIgXVJY0MInclLEtJ1AoMPtjja0tvBD0zPHSAyxIgZ%2B3EECIQDTj7KrkhXuZqKr6sF0hqwr%2BiMiByMi7gNjK4DOqxJ7YjANBgkqhkiG9w0BAQsFAAOCAgEAeOXA%2FpFjaSlenGSQSMDbbSXM%2BL2nM0M1yQ8WxM2mxRfAxzyuH%2FDo1UGDmbvu1e6f%2FdA6Gr%2BAdx2EFia3FqIBrnB9BAymlMgYKq3pW67b83k8r6iF5UcwxISE4LXplY8iV12a59EUCHr0YnVUzK3gLN9ocPyGHnsRdzuowU7WRtZ2tMFAlVT2dEGPqG2ZKsIiCBRummp1vNF3b%2BB5g4Y5Hc7Vw1%2F1LgPMsaSPj5%2Fl4YdLCIO2tWYqnpA0LE8xuRXFSRA0fmlZQKr01N0%2B1ar2QRH6PcRJE3EJbgdnsIGDMithZ4a2COinwCWNkuj6lwB83RvfGOdwJfVv9ricvRpdMOs3HSQnRk0q1IreY42VVmtOGt6MfuCPaIMZtI0unkd3GHmCDcoe64HIu7sjdTCqWAR60JZpQ4oM%2BOpzfBulhf44BDh33zM7lNAlEtVN%2BtszLA2S3CCoDTHpUGWkes%2BzkI4qjG5Nd1eGZT%2FtqqWyRc799ROCEAI5SkgZgowqRgzMhkazdyDANLTbg2Edt4OT7O6zrdLg70JTZMxdJ5%2BAnDMmDr8NCH63URFJe72ZBOH4uAeZuV%2Bhbh9v1%2BF2kFaqVBh2VaRdY%2FHGpnoD%2By1bJ7FI1erKUJFt%2FP4ZEYjACkmT7Gtw8NifvECY3cw3aiAY7AMg2Bnk72ySxvBcXedVMU8%3D&cert=MIIGtjCCBJ6gAwIBAgIRAJltX%2Bmt4Wzcjs2%2F7bFKMpUwDQYJKoZIhvcNAQELBQAwYzELMAkGA1UEBhMCVFcxIzAhBgNVBAoMGkNodW5naHdhIFRlbGVjb20gQ28uLCBMdGQuMS8wLQYDVQQDDCZlUEtJIFJvb3QgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkgLSBHMjAeFw0xOTA3MTkwNjQ2NDVaFw0zMTA4MTkwNjQ2NDVaMFgxCzAJBgNVBAYTAlRXMRIwEAYDVQQKDAnooYzmlL%2FpmaIxNTAzBgNVBAMMLOaUv%2BW6nOS8uuacjeWZqOaVuOS9jeaGkeitieeuoeeQhuS4reW%2FgyAtIEcxMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAwg5R4LGoDj%2BmZIXmcHmRYv501jsSLIm7EoX%2FKAt74uN2yDR436V2EWkFeWhD%2BTS4sx2%2F3JCRW%2BKE%2BIX8NYBKjsWuK9OMY4Gu4FEWJpBu1XCWYjTPKyhHdEhDpxRxv91g3Zk68XgK7j2U5sEzCPx13QjkH7qc%2FMo5BFiro8YsYAfxgCoa%2FrZFEsXyZKXRJeIDw7t%2BiPxVy2cbQ0uNloO9670LGoOVzYVkYABv3IwZo%2BJRtj%2Bj7rLjB7xQKYmfJOA2Jc96yPm6li7zHrIQYfohGPdANmwR9opNNqYOo%2BLtsIYot3%2FcLp9YgAaiGdrAiKrbbEVkYH%2BzKzAHolf5mPBn%2Bh3OElYfygESitWRBp2bwfOGJwAYseTuorQHpyQps1GGcn9vcfnLhvLxa3DMrCAvSJb3SvHCyqahQz0KR0IPcu%2BVLW3icaqlbJausGIGYqp8VSN6FJ0pgmYdbunBLYc1v23VvjmVMl%2BxNJoaSFEUscmSqA4CuYANhkWSANk8HI9rNbvmzuyWhSv7tUXY6UB67mHp4ypGcKYbXrjiKqahv6QLUEb7S8FD71Ds75F2vMeO4O77i6joBs%2FL2E6WZJvSronzJCXL0IwmpYaOAsoFOf0eGVsPBVKn%2Bz4Bq0WA0%2Br7plfWofDbUGmx9Zun%2B%2BrWhoDXrma%2BodubN1Xj1RjlL3sCAwEAAaOCAW4wggFqMB8GA1UdIwQYMBaAFHJbuqpyOO4lkCS1lCL6CYjKiwr7MB0GA1UdDgQWBBTW6y2dYf4ru3CILrgHsVmw9IMiajAOBgNVHQ8BAf8EBAMCAYYwPAYDVR0fBDUwMzAxoC%2BgLYYraHR0cDovL2VjYS5oaW5ldC5uZXQvcmVwb3NpdG9yeS9DUkwyL0NBLmNybDCBggYIKwYBBQUHAQEEdjB0MDsGCCsGAQUFBzAChi9odHRwOi8vZWNhLmhpbmV0Lm5ldC9yZXBvc2l0b3J5L0NlcnRzL2VDQUcyLmNydDA1BggrBgEFBQcwAYYpaHR0cDovL29jc3AuZWNhLmhpbmV0Lm5ldC9PQ1NQL29jc3BHMnNoYTIwEgYDVR0TAQH%2FBAgwBgEB%2FwIBADAiBgNVHSAEGzAZMA0GCysGAQQBgbcjZAADMAgGBmeBDAECAjAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDQYJKoZIhvcNAQELBQADggIBAEyrsJ9vUi6nEfwO0vgAoFefXpCRF%2BuDsmG%2F8F6OV9VRnbtzBwazHbxVmaBvDRVofLfoXWr%2BNd8dd3BXVUNxemNrkZa8Hdgdv4s8yFbRs0W6fRTWkhCcc39RpQtSeV7kyxCP1rMTYRSqCA9F%2BFcDMLXJIzZrzl7Tn6guIyqcfZv6sRN7CbbTrYKSc0JX4t26WGFun2zLjzH8kx1TZ457TE4yyjl1oSZdgiWL6Hz7l%2BnbTe6WqPVVm4am2AAmaQaLGncsGLasl7PIHx9Nc4sy7KdOMTc5r0BPCGhAiJ6ueQ6aVd49pra7BDIqFMA7Myy4pXRYfqFnjq9RuROWYiIluzLNUSxlaFtTMUVQnWjJxnlXlBDLX9L4OAxTOvdbtcNNS1GK%2BW1cWiYdTOWF4HTu5pvdUn%2F%2B8yVE4E7MPb0vGuxv3S11QG6JtVPuHkX6BGqRXHo253gY77HZU0g3g9qVs9UaZjWS5UTcqdgLmmOQnH7USaJ9%2F4rXRu%2FP8IWMPG2s6tv1dRVQV5xfq21PQ4y53ytVd0%2B%2Flp0L743%2B1AjnOw0I8t9QxP6c2ti%2Boo43rxM8YE3etVLQBeWsmJc00GOWa%2FXmFACsy8Lkctx0QScAAYwCfB2accfxj9hEX1c6MAeVUVp04YJx4dtjoIFTPI1%2FMFX%2BFkxMq4Fs6k%2BmxSm7tNvv&cert=MIIHZDCCBUygAwIBAgIRAK%2FNjWQsYtZFBn3IV%2F2o8V0wDQYJKoZIhvcNAQELBQAwXjELMAkGA1UEBhMCVFcxIzAhBgNVBAoMGkNodW5naHdhIFRlbGVjb20gQ28uLCBMdGQuMSowKAYDVQQLDCFlUEtJIFJvb3QgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwHhcNMTUxMTE3MDg1MTM1WhcNMzQxMjIwMDIzMTI3WjBjMQswCQYDVQQGEwJUVzEjMCEGA1UECgwaQ2h1bmdod2EgVGVsZWNvbSBDby4sIEx0ZC4xLzAtBgNVBAMMJmVQS0kgUm9vdCBDZXJ0aWZpY2F0aW9uIEF1dGhvcml0eSAtIEcyMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEApFkfoC%2FfvuD76dy1if5alwPJOnenjlyv8uMYOfWq3Q9G0mgPV5ynY2DTWM41wqf2iMJPfxso6dCnAMQXTW3iD8UOJiMgq%2Fc6KKJMCgvMjs7mAJpaQA3UUBqb0Q2clPnb7lzQ8YoHzZorQCxJpF1iX6dr3%2B5WCFDzQhhsMbBe5ZxzkrwO0gx9xThXvLtY2yYZAu3jQ4SKTlZr262hMdnMImeWeP93ncxkxTIgau9OMNUkJf2Iea9xGv7VSxsViLwYcKq9rTgKZjBG5YmF1XYkqamz5llgD7SpU8I6nUUa1q7jd17EYjYzLzDEv5XxLTildejRapMuRYdLSqLfv1gnmspiGape1LGASZbdK%2Bxfj5vgnZeI9YQDo6%2BzpXMtQbrlB7dva3H398lar2mZsy%2FIT0LrbGtxZ3jfCqxP10qFAEYa1c24n%2BqVnQ980cYFheYI3ogXgfbVtW7qoRzXYarjWUKJnFl%2BsXxkNN1hIyo5tRCr%2FIapUxrF62rigE5ZkcA4if6zXdb7kenXsH3ZeAjM9SvMK%2BGh1pRzwf5R9Ix9CrWairn12uDJs9iPqoKDjWlTLf0ABBhKoNpU4XmMiet%2F9YLnoLl3Ta75ugI7iHbrfF2zWhPbfCkWa5nRHeRIIaINXgGI6L7xmE0%2BxxZXHF%2FhCG8cTFhDVveAZYxxDqIEZ08CAwEAAaOCAhYwggISMB8GA1UdIwQYMBaAFB4M97Zn8uGSJglFwFU5Lnc%2FQkqiMB0GA1UdDgQWBBRyW7qqcjjuJZAktZQi%2BgmIyosK%2BzAOBgNVHQ8BAf8EBAMCAQYwQAYDVR0fBDkwNzA1oDOgMYYvaHR0cDovL2VjYS5oaW5ldC5uZXQvcmVwb3NpdG9yeS9DUkxfU0hBMi9DQS5jcmwwgYIGCCsGAQUFBwEBBHYwdDA7BggrBgEFBQcwAoYvaHR0cDovL2VjYS5oaW5ldC5uZXQvcmVwb3NpdG9yeS9DZXJ0cy9lQ0FHMS5jcnQwNQYIKwYBBQUHMAGGKWh0dHA6Ly9vY3NwLmVjYS5oaW5ldC5uZXQvT0NTUC9vY3NwRzFzaGEyMA8GA1UdEwEB%2FwQFMAMBAf8wgecGA1UdIASB3zCB3DANBgsrBgEEAYG3I2QAATANBgsrBgEEAYG3I2QAAjANBgsrBgEEAYG3I2QAAzANBgsrBgEEAYG3I2QABDANBgsrBgEEAYG3I2QACTANBgsrBgEEAYG3I2QAADANBgsrBgEEAYG3I2QEATANBgsrBgEEAYG3I2QEAjANBgsrBgEEAYG3I2QEAzAJBgdghnYBZAABMAkGB2CGdgFkAAIwCQYHYIZ2AWQAAzAJBgdghnYBZAAEMAkGB2CGdgFkAAAwCAYGZ4EMAQIBMAgGBmeBDAECAjAIBgZngQwBAgMwDQYJKoZIhvcNAQELBQADggIBALwy4mxatKA6X%2BUM2IDpnWajNmek00EM4qh5E7eiQY0yZV5Eit9D%2F8q9h0hD77NjVaYPwsOWqWAiVtDAro%2BnWDHfkAG14ptRNBoGjJjzZi%2F%2BOeI2WTc8ZER6C8rAjQ7b%2FRxMzwxfDjRtgCbT2qq01rPiJ%2BqDgyUniDstbyQj08bSo3GJWp6ZsSNDAP26ygODpSgL0Ja806Byk2b4npQevdkmQ0k43S9IU0MeSlWT8hxzluyFlPRl4yuev5le91outdEdpV98KvYcgLAWwW5UcFOM6SRsYTBS2dfSRgKreDnMNdbUHmbAVsb3wLD6WqLoe6LyRNOeXctKPA6%2Be5i%2FJN6NZnqejcMopuS%2BpyWyrNiHlRShGUfTiXrcbT8fbyOswAT8JsX4fWyZYub0kKfFG8hEKQsIxNiyKH4cw6HBih31EYaYS9IEj19NxfHl0KbPm22cpBJoGwkZWgg%2F%2FPflFFHNTdKSalDxPHMKdyZbTBugLtqFVkV%2Bvu1y6WRoGfHwzpa9aQsMWAwLYRnBZnSYzfN9QFZsoHCSDJJVt30Oi6fURJy34%2Bdtvs%2BsQihiN886uYTJ0Cex1R%2BOb9HXCKFrGTumgwD%2Bnitt7hwlB74K9lqrKQrtfgfBFFMG9Tu%2FE%2FOI6JoST2j8KmSN1rpcxoMH3tamxqm3%2BxpLM9HekbBoJ0V2&cert=MIIFsDCCA5igAwIBAgIQFci9ZUdcr7iXAF7kBtK8nTANBgkqhkiG9w0BAQUFADBeMQswCQYDVQQGEwJUVzEjMCEGA1UECgwaQ2h1bmdod2EgVGVsZWNvbSBDby4sIEx0ZC4xKjAoBgNVBAsMIWVQS0kgUm9vdCBDZXJ0aWZpY2F0aW9uIEF1dGhvcml0eTAeFw0wNDEyMjAwMjMxMjdaFw0zNDEyMjAwMjMxMjdaMF4xCzAJBgNVBAYTAlRXMSMwIQYDVQQKDBpDaHVuZ2h3YSBUZWxlY29tIENvLiwgTHRkLjEqMCgGA1UECwwhZVBLSSBSb290IENlcnRpZmljYXRpb24gQXV0aG9yaXR5MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA4SUP7o3biDN1Z82tH306Tm2d0y8U82N0ywEhajfqhFAHSyZbCUNsIZ5qyNUD9WBpj8zwIuQf5%2FdqIjG3LBXy4P4AakP%2Fh2XGtRrBp0xtInAhijHyl3SJCRImHJ7K2RKilTza6We%2FCKBk49ZCt0Xvl%2FT29de1ShUCWH2YWEtgvM3XDZoTM1PRYfl61dd4s5oz9wCGzh1NlDivqOx4UXCKXBCDUSH3ET00hl7lSM2XgYI1TBnsZfZrxQWh7kcT1rMhJ5QQCtkkO7q%2BRBNGMD%2BXPNjX12ruOzjjK9SXDrkb5wdJfzcq%2BXd4z1TtW0ado4AOkUPB1ltfFLqfpo0kR0BZv3I4sjZsN%2F%2BZ0V0OWQqraffAsgRFelQArr5T9rXn4fg8ozHSqf4hUmTFpmfwdQcGlBSBVcYn5AGPF8Fqcde%2BS%2FuUWH1%2BETOxQvdibBjWzwloPn9s9h6PYq2lY9sJpx8iQkEeb5mKPtf5P0B6ebClAZLSnT0IFaUQAS2zMnaolQ2zepr7BxB4EW%2Fhj8e6DyUadCrlHJhBmd8hh%2BiVBmoKs2pHdmX2Os%2BPYhcZewoozRrSgx4hxyy%2Fvv9haLdnG7t4TY3OZ%2BXkwY63I2binZB1NJipNiuKmpS5nezMirH4JYlcWrYvjB9teSSnUmjDhDXiZo1jDiVN1Rmy5nk3pyKdVDECAwEAAaNqMGgwHQYDVR0OBBYEFB4M97Zn8uGSJglFwFU5Lnc%2FQkqiMAwGA1UdEwQFMAMBAf8wOQYEZyoHAAQxMC8wLQIBADAJBgUrDgMCGgUAMAcGBWcqAwAABBRFsMLHClZ87lt4DJX5GFPBphzYEDANBgkqhkiG9w0BAQUFAAOCAgEACbODU1kBPpVJufGBuvl2ICO1J2B01GqZNF5sAFPZn%2FKmsSQHRGoqxqWOeBLoR9lYGxMqXnmbnwoqZ6YlPwZpVnPDimZI%2BymBV3QGypzqKOg4ZyYr8dW1P2WT%2BDZdjo2NQCCHGervJ8A9tDkPJXtoUHRVnAxZfVo9QZQlUgjgRywVMRnVvwdVxrsStZf0X4OFunHB2WyBEXYKCrC%2Fgpf36j36%2BuwtqSiUO1bd0lEursC9CBWMd1I0ltabrNMdjmEPNXubrjlpC2JgQCA2j6%2F7Nu4tCEoduL%2BbXPjqpRugc6bY%2BG7gMwRfaKonh%2B3ZwZCc7b3jajWvY9%2BrGNm65ulK6lCKD2GTHuItGeIwlDWSXQ62B68ZgI9HkFFLLk3dheLSClIKF5r8GrBQAuUBo2M3IUxExJtRmREOc5wGj1QupyheRDmHVi03vYVElOEMSyycw5KFNGHLD7ibSkNS%2FjQ6fbjpKdx2qcgw%2BBRxgMYeNkh0IkFch4LoGHGLQYlE535YW6i4jRPpp2zDR%2B2zGp1iro2C6pSe3VkQw63d4k3jMdXH7OjysP6SHhYKGvzZ8%2Fgntsm%2BHbRsZJB%2F9OTEW9c3rkIO3aQab3yIVMUWbuF6aC74Or8NpDyJO3inTmODBCEIZ43ygknQW%2F2xzQ%2BDhNQ%2BIIX3Sj0rnP0qCglN6oH4EZw%3D";
+
+  await BrowserTestUtils.withNewTab(kURL, async function (browser) {
+    await SpecialPowers.spawn(browser, [], async function () {
+      let certificateSection = await ContentTaskUtils.waitForCondition(() => {
+        return content.document.querySelector("certificate-section");
+      }, "Certificate section found");
+
+      let tabs =
+        certificateSection.shadowRoot.querySelector(
+          ".certificate-tabs"
+        ).children;
+
+      Assert.ok(tabs, "Tabs were found");
+      Assert.equal(tabs.length, 4, "There should be 4 tabs");
+      for (let tab of tabs) {
+        Assert.ok(tab.textContent, "Tab should have non-empty label");
+        Assert.notEqual(
+          tab.dataset.l10nId,
+          "certificate-viewer-unknown-group-label"
+        );
+        // If there is another tab after this one, this tab should link to the
+        // next via its issuer's common name or OU, if available.
+        if (tab.nextElementSibling) {
+          tab.click();
+          let infoGroup = certificateSection.shadowRoot.querySelector(
+            ".selected info-group.issuer-name"
+          );
+          Assert.ok(infoGroup, "infoGroup found");
+          let container =
+            infoGroup.shadowRoot.querySelector(".common-name") ||
+            infoGroup.shadowRoot.querySelector(".organizational-unit");
+          Assert.ok(container, "Should find container for link");
+          Assert.ok(
+            container.shadowRoot.querySelector("a"),
+            "There should be a link in the container for " +
+              container.textContent
+          );
+        }
+      }
+    });
+  });
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_checkNonEmptyFields.js b/toolkit/components/certviewer/tests/browser/browser_checkNonEmptyFields.js
new file mode 100644
index 0000000000..e6c48dc3d1
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_checkNonEmptyFields.js
@@ -0,0 +1,82 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+async function checkNonEmptyFields(url) {
+  await BrowserTestUtils.withNewTab(url, async function (browser) {
+    await SpecialPowers.spawn(browser, [], async function () {
+      let certificateSection = await ContentTaskUtils.waitForCondition(() => {
+        return content.document.querySelector("certificate-section");
+      }, "Certificate section found");
+
+      let tabs =
+        certificateSection.shadowRoot.querySelector(
+          ".certificate-tabs"
+        ).children;
+
+      Assert.ok(tabs, "Tabs were found");
+      Assert.greater(tabs.length, 0, "There must at least one tab");
+
+      function clickTabAndCheckSelection(tabID) {
+        let selectedTabBefore = 0;
+
+        for (let i = 0; i < tabs.length; i++) {
+          if (tabs[i].className.includes("selected")) {
+            selectedTabBefore = i;
+            break;
+          }
+        }
+
+        let tabButton = certificateSection.shadowRoot.querySelector(
+          `.certificate-tabs .tab[idnumber="${tabID}"]`
+        );
+        tabButton.click();
+
+        if (tabID !== 0) {
+          Assert.notEqual(
+            selectedTabBefore,
+            tabID,
+            "A new tab should be selected now"
+          );
+        }
+      }
+
+      for (let i = 0; i < tabs.length; i++) {
+        clickTabAndCheckSelection(i);
+
+        let infoGroups =
+          certificateSection.shadowRoot.querySelectorAll("info-group");
+        Assert.ok(infoGroups, "infoGroups found");
+
+        for (let infoGroup of infoGroups) {
+          let infoItems = infoGroup.shadowRoot.querySelectorAll("info-item");
+          Assert.ok(infoItems, "infoItems found");
+
+          for (let infoItem of infoItems) {
+            let item = infoItem.shadowRoot.querySelector(".info");
+            if (item.textContent.length === 0) {
+              await ContentTaskUtils.waitForCondition(
+                () => parseInt(item.textContent.length) > 0,
+                "info-item has not been localized."
+              );
+            }
+          }
+        }
+      }
+    });
+  });
+}
+
+add_task(async function test() {
+  const url1 =
+    "about:certificate?cert=MIIIIDCCBwigAwIBAgIQdFFdOvtZKGMnFerJav62lzANBgkqhkiG9w0BAQsFADBUMQswCQYDVQQGEwJVUzEeMBwGA1UEChMVR29vZ2xlIFRydXN0IFNlcnZpY2VzMSUwIwYDVQQDExxHb29nbGUgSW50ZXJuZXQgQXV0aG9yaXR5IEczMB4XDTE5MDcyOTE4NDQyN1oXDTE5MTAyMTE4MjMwMFowZjELMAkGA1UEBhMCVVMxEzARBgNVBAgMCkNhbGlmb3JuaWExFjAUBgNVBAcMDU1vdW50YWluIFZpZXcxEzARBgNVBAoMCkdvb2dsZSBMTEMxFTATBgNVBAMMDCouZ29vZ2xlLmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABOOufVj7d5UF%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%2FftYprTgIqQTFvmZIl%2BXaGTAMBgNVHRMBAf8EAjAAMB8GA1UdIwQYMBaAFHfCuFCaZ3Z2sS3ChtCDoH6mfrpLMCEGA1UdIAQaMBgwDAYKKwYBBAHWeQIFAzAIBgZngQwBAgIwMQYDVR0fBCowKDAmoCSgIoYgaHR0cDovL2NybC5wa2kuZ29vZy9HVFNHSUFHMy5jcmwwDQYJKoZIhvcNAQELBQADggEBADc7%2BG7Np83iC8KU6GYSKizr%2F2VbPPpBjR5EzXIdUpUgxWFQ7Faxd1LVhm22QVlmMKjjYe7JUxnaIa5Zay6pBlMr5Fq%2BHbSTuA63GOt4IW1CvB1zAOaJWfxGXaNX1Xg%2F740qWEDoe95h9Xm%2FfIcFLD86FCUITAenFKBOKdaKoBMGoDBOq7jUdn492oGBYi%2BQtXfNjvcZm0yABGTjQOtH8JzyWKx1NvNLw5gSXYH5Vmj%2FQzRBEED3%2BpIJh6vgKIGEhG%2BhCg4tx4k0nnwoHGnL4a2mcemlRIWRCcjbb%2FBoF%2B05EvQvB6PcurckBaPN8r7wWCxefYViIMnHiMmzPdwZYIA%3D&cert=MIIEXDCCA0SgAwIBAgINAeOpMBz8cgY4P5pTHTANBgkqhkiG9w0BAQsFADBMMSAwHgYDVQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMjETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UEAxMKR2xvYmFsU2lnbjAeFw0xNzA2MTUwMDAwNDJaFw0yMTEyMTUwMDAwNDJaMFQxCzAJBgNVBAYTAlVTMR4wHAYDVQQKExVHb29nbGUgVHJ1c3QgU2VydmljZXMxJTAjBgNVBAMTHEdvb2dsZSBJbnRlcm5ldCBBdXRob3JpdHkgRzMwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDKUkvqHv%2FOJGuo2nIYaNVWXQ5IWi01CXZaz6TIHLGp%2FlOJ%2B600%2F4hbn7vn6AAB3DVzdQOts7G5pH0rJnnOFUAK71G4nzKMfHCGUksW%2Fmona%2BY2emJQ2N%2BaicwJKetPKRSIgAuPOB6Aahh8Hb2XO3h9RUk2T0HNouB2VzxoMXlkyW7XUR5mw6JkLHnA52XDVoRTWkNty5oCINLvGmnRsJ1zouAqYGVQMc%2F7sy%2B%2FEYhALrVJEA8KbtyX%2Br8snwU5C1hUrwaW6MWOARa8qBpNQcWTkaIeoYvy%2FsGIJEmjR0vFEwHdp1cSaWIr6%2F4g72n7OqXwfinu7ZYW97EfoOSQJeAzAgMBAAGjggEzMIIBLzAOBgNVHQ8BAf8EBAMCAYYwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMBIGA1UdEwEB%2FwQIMAYBAf8CAQAwHQYDVR0OBBYEFHfCuFCaZ3Z2sS3ChtCDoH6mfrpLMB8GA1UdIwQYMBaAFJviB1dnHB7AagbeWbSaLd%2FcGYYuMDUGCCsGAQUFBwEBBCkwJzAlBggrBgEFBQcwAYYZaHR0cDovL29jc3AucGtpLmdvb2cvZ3NyMjAyBgNVHR8EKzApMCegJaAjhiFodHRwOi8vY3JsLnBraS5nb29nL2dzcjIvZ3NyMi5jcmwwPwYDVR0gBDgwNjA0BgZngQwBAgIwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly9wa2kuZ29vZy9yZXBvc2l0b3J5LzANBgkqhkiG9w0BAQsFAAOCAQEAHLeJluRT7bvs26gyAZ8so81trUISd7O45skDUmAge1cnxhG1P2cNmSxbWsoiCt2eux9LSD%2BPAj2LIYRFHW31%2F6xoic1k4tbWXkDCjir37xTTNqRAMPUyFRWSdvt%2BnlPqwnb8Oa2I%2FmaSJukcxDjNSfpDh%2FBd1lZNgdd%2F8cLdsE3%2BwypufJ9uXO1iQpnh9zbuFIwsIONGl1p3A8CgxkqI%2FUAih3JaGOqcpcdaCIzkBaR9uYQ1X4k2Vg5APRLouzVy7a8IVk6wuy6pm%2BT7HT4LY8ibS5FEZlfAFLSW8NwsVz9SBK2Vqn1N0PIMn5xA6NZVc7o835DLAFshEWfC7TIe3g%3D%3D&cert=MIIDujCCAqKgAwIBAgILBAAAAAABD4Ym5g0wDQYJKoZIhvcNAQEFBQAwTDEgMB4GA1UECxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjIxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMTCkdsb2JhbFNpZ24wHhcNMDYxMjE1MDgwMDAwWhcNMjExMjE1MDgwMDAwWjBMMSAwHgYDVQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMjETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UEAxMKR2xvYmFsU2lnbjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKbPJA6%2BLm8omUVCxKs%2BIVSbC9N%2FhHD6ErPLv4dfxn%2BG07IwXNb9rfF73OX4YJYJkhD10FPe%2B3t%2Bc4isUoh7SqbKSaZeqKeMWhG8eoLrvozps6yWJQeXSpkqBy%2B0Hne%2Fig%2B1AnwblrjFuTosvNYSuetZfeLQBoZfXklqtTleiDTsvHgMCJiEbKjNS7SgfQx5TfC4LcshytVsW33hoCmEofnTlEnLJGKRILzdC9XZzPnqJworc5HGnRusyMvo4KD0L5CLTfuwNhv2GXqF4G3yYROIXJ%2FgkwpRl4pazq%2Br1feqCapgvdzZX99yqWATXgAByUr6P6TqBwMhAo6CygPCm48CAwEAAaOBnDCBmTAOBgNVHQ8BAf8EBAMCAQYwDwYDVR0TAQH%2FBAUwAwEB%2FzAdBgNVHQ4EFgQUm%2BIHV2ccHsBqBt5ZtJot39wZhi4wNgYDVR0fBC8wLTAroCmgJ4YlaHR0cDovL2NybC5nbG9iYWxzaWduLm5ldC9yb290LXIyLmNybDAfBgNVHSMEGDAWgBSb4gdXZxwewGoG3lm0mi3f3BmGLjANBgkqhkiG9w0BAQUFAAOCAQEAmYFThxxol4aR7OBKuEQLq4GsJ0%2FWwbgcQ3izDJr86iw8bmEbTUsp9Z8FHSbBuOmDAGJFtqkIk7mpM0sYmsL4h4hO291xNBrBVNpGP%2BDTKqttVCL1OmLNIG%2B6KYnX3ZHu01yiPqFbQfXf5WRDLenVOavSot%2B3i9DAgBkcRcAtjOj4LaR0VknFBbVPFd5uRHg5h6h%2Bu%2FN5GJG79G%2BdwfCMNYxdAfvDbbnvRG15RjF%2BCv6pgsH%2F76tuIMRQyV%2BdTZsXjAzlAcmgQWpzU%2FqlULRuJQ%2F7TBj0%2FVLZjmmx6BEP3ojY%2Bx1J96relc8geMJgEtslQIxq%2FH5COEBkEveegeGTLg%3D%3D";
+  const url2 =
+    "about:certificate?cert=MIIDeTCCAmGgAwIBAgIJAPziuikCTox4MA0GCSqGSIb3DQEBCwUAMGIxCzAJBgNVBAYTAlVTMRMwEQYDVQQIDApDYWxpZm9ybmlhMRYwFAYDVQQHDA1TYW4gRnJhbmNpc2NvMQ8wDQYDVQQKDAZCYWRTU0wxFTATBgNVBAMMDCouYmFkc3NsLmNvbTAeFw0xOTEwMDkyMzQxNTJaFw0yMTEwMDgyMzQxNTJaMGIxCzAJBgNVBAYTAlVTMRMwEQYDVQQIDApDYWxpZm9ybmlhMRYwFAYDVQQHDA1TYW4gRnJhbmNpc2NvMQ8wDQYDVQQKDAZCYWRTU0wxFTATBgNVBAMMDCouYmFkc3NsLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMIE7PiM7gTCs9hQ1XBYzJMY61yoaEmwIrX5lZ6xKyx2PmzAS2BMTOqytMAPgLaw%2BXLJhgL5XEFdEyt%2FccRLvOmULlA3pmccYYz2QULFRtMWhyefdOsKnRFSJiFzbIRMeVXk0WvoBj1IFVKtsyjbqv9u%2F2CVSndrOfEk0TG23U3AxPxTuW1CrbV8%2Fq71FdIzSOciccfCFHpsKOo3St%2FqbLVytH5aohbcabFXRNsKEqveww9HdFxBIuGa%2BRuT5q0iBikusbpJHAwnnqP7i%2FdAcgCskgjZjFeEU4EFy%2Bb%2Ba1SYQCeFxxC7c3DvaRhBB0VVfPlkPz0sw6l865MaTIbRyoUCAwEAAaMyMDAwCQYDVR0TBAIwADAjBgNVHREEHDAaggwqLmJhZHNzbC5jb22CCmJhZHNzbC5jb20wDQYJKoZIhvcNAQELBQADggEBAGlwCdbPxflZfYOaukZGCaxYK6gpincX4Lla4Ui2WdeQxE95w7fChXvP3YkE3UYUE7mupZ0eg4ZILr%2FA0e7JQDsgIu%2FSRTUE0domCKgPZ8v99k3Avka4LpLK51jHJJK7EFgo3ca2nldd97GM0MU41xHFk8qaK1tWJkfrrfcGwDJ4GQPIiLlm6i0yHq1Qg1RypAXJy5dTlRXlCLd8ufWhhiwW0W75Va5AEnJuqpQrKwl3KQVewGj67WWRgLfSr%2B4QG1mNvCZb2CkjZWmxkGPuoP40%2Fy7Yu5OFqxP5tAjj4YixCYTWEVA0pmzIzgBg%2BJIe3PdRy27T0asgQW%2FF4TY61Yk%3D";
+  const url3 =
+    "about:certificate?cert=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%2FpnCujW0r8%2B55jE8Ez64AO7NV1sId6eINm6zWYyN3L69wj1x81YyY7nDl7qPv4coRQKFWyGhFtkZip6qUtTefWIonvuLwphK42yfk1WpRPs6tqSnqxEQR5YYGUFZvjARL3LlPdCfgv3ZWiYUQXw8wWRBB0bF4LsyFe7w2t6iPGwcswlWyCR7BYCEo8y6RcYSNDHBS4CMEK4JZwFaz%2BqOqfrU0j36NK2B5jcG8Y0f3%2FJHIJ6BVgrCFvzOKKrF11myZjXnhCLotLddJr3cQxyYN%2FNb5gznZY0dj4kepKwDpUeb%2BagRThHqtdB7Uq3EvbXG4OKDy7YCbZZ16oE%2F9KTfWgu3YtLq1i6L43qlaegw1SJpfvbi1EinbLDvhG%2BLJGGi5Z4rSDTii8aP8bQUWWHIbEZAWV%2FRRyH9XzQQUxPKZgh%2FTMfdQwEUfoZd9vUFBzugcMd9Zi3aQaRIt0AUMyBMawSB3s42mhb5ivUfslfrejrckzzAeVLIL%2BaplfKkQABi6F1ITe1Yw1nPkZPcCBnzsXWWdsC4PDSy826YreQQejdIOQpvGQpQsgi3Hia%2F0PsmBsJUUtaWsJx8cTLc6nloQsCAwEAAaOCAX8wggF7MB0GA1UdDgQWBBQWtTIb1Mfz4OaO873SsDrusjkY0TAPBgNVHRMBAf8EBTADAQH%2FMDQGCWCGSAGG%2BEIBCAQnFiVodHRwOi8vd3d3LmNhY2VydC5vcmcvaW5kZXgucGhwP2lkPTEwMFYGCWCGSAGG%2BEIBDQRJFkdUbyBnZXQgeW91ciBvd24gY2VydGlmaWNhdGUgZm9yIEZSRUUgaGVhZCBvdmVyIHRvIGh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzAxBgNVHR8EKjAoMCagJKAihiBodHRwOi8vY3JsLmNhY2VydC5vcmcvcmV2b2tlLmNybDAzBglghkgBhvhCAQQEJhYkVVJJOmh0dHA6Ly9jcmwuY2FjZXJ0Lm9yZy9yZXZva2UuY3JsMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEFBQcwAYYWaHR0cDovL29jc3AuY2FjZXJ0Lm9yZzAfBgNVHSMEGDAWgBQWtTIb1Mfz4OaO873SsDrusjkY0TANBgkqhkiG9w0BAQsFAAOCAgEAR5zXs6IX01JTt7Rq3b%2BbNRUhbO9vGBMggczo7R0qIh1kdhS6WzcrDoO6PkpuRg0L3qM7YQB6pw2V%2BubzF7xl4C0HWltfzPTbzAHdJtjaJQw7QaBlmAYpN2CLB6Jeg8q%2F1Xpgdw%2F%2BIP1GRwdg7xUpReUA482l4MH1kf0W0ad94SuIfNWQHcdLApmno%2FSUh1bpZyeWrMnlhkGNDKMxCCQXQ360TwFHc8dfEAaq5ry6cZzm1oetrkSviE2qofxvv1VFiQ%2B9TX3%2FzkECCsUB%2FEjPM0lxFBmu9T5Ih%2BEqns9ivmrEIQDv9tNyJHuLsDNqbUBal7OoiPZnXk9LH%2Bqb%2BpLf1ofv5noy5vX2a5OKebHe%2B0Ex%2FA7e%2BG%2FHuOjVNqhZ9j5Nispfq9zNyOHGWD8ofj8DHwB50L1Xh5H%2BEbIoga%2FhJCQnRtxWkHP699T1JpLFYwapgplivF4TFv4fqp0nHTKC1x9gGrIgvuYJl1txIKmxXdfJzgscMzqpabhtHOMXOiwQBpWzyJkofF%2Fw55e0LttZDBkEsilV%2FvW0CJsPs3eNaQF%2BiMWscGOkgLFlWsAS3HwyiYLNJo26aqyWPaIdc8E4ck7Sk08WrFrHIK3EHr4n1FZwmLpFAvucKqgl0hr%2B2jypyh5puA3KksHF3CsUzjMUvzxMhykh9zrMxQAHLBVrGwc%3D";
+
+  let urls = [url1, url2, url3];
+
+  await Promise.all(urls.map(checkNonEmptyFields));
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_checkNonRepeatedCertTabs.js b/toolkit/components/certviewer/tests/browser/browser_checkNonRepeatedCertTabs.js
new file mode 100644
index 0000000000..1e11cc4786
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_checkNonRepeatedCertTabs.js
@@ -0,0 +1,131 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+function checkCertTabs() {
+  let certificatePages = 0;
+  for (let tab of gBrowser.tabs) {
+    let spec = tab.linkedBrowser.documentURI.spec;
+    if (spec.includes("about:certificate")) {
+      certificatePages++;
+    }
+  }
+  Assert.equal(certificatePages, 1, "Do not open repeated certificate pages!");
+}
+
+add_task(async function testBadCert() {
+  info("Testing bad cert");
+
+  let tab = await openErrorPage();
+
+  let loaded = BrowserTestUtils.waitForNewTab(gBrowser, null, true);
+  for (let i = 0; i < 2; i++) {
+    // try opening two certificates that are the same
+    await SpecialPowers.spawn(tab.linkedBrowser, [], async function () {
+      let advancedButton = content.document.getElementById("advancedButton");
+      Assert.ok(advancedButton, "advancedButton found");
+      Assert.equal(
+        advancedButton.hasAttribute("disabled"),
+        false,
+        "advancedButton should be clickable"
+      );
+      advancedButton.click();
+      let viewCertificate = content.document.getElementById("viewCertificate");
+      Assert.ok(viewCertificate, "viewCertificate found");
+      Assert.equal(
+        viewCertificate.hasAttribute("disabled"),
+        false,
+        "viewCertificate should be clickable"
+      );
+
+      viewCertificate.click();
+    });
+    await loaded;
+  }
+  checkCertTabs();
+
+  gBrowser.removeCurrentTab(); // closes about:certificate
+  gBrowser.removeCurrentTab(); // closes https://expired.example.com/
+});
+
+add_task(async function testGoodCert() {
+  info("Testing page info");
+  let url = "https://example.com/";
+
+  info(`Loading ${url}`);
+  await BrowserTestUtils.withNewTab({ gBrowser, url }, async function () {
+    info("Opening pageinfo");
+    let pageInfo = BrowserPageInfo(url, "securityTab", {});
+    await BrowserTestUtils.waitForEvent(pageInfo, "load");
+
+    let securityTab = pageInfo.document.getElementById("securityTab");
+    await TestUtils.waitForCondition(
+      () => BrowserTestUtils.isVisible(securityTab),
+      "Security tab should be visible."
+    );
+    Assert.ok(securityTab, "Security tab is available");
+    let viewCertButton = pageInfo.document.getElementById("security-view-cert");
+    await TestUtils.waitForCondition(
+      () => BrowserTestUtils.isVisible(viewCertButton),
+      "view cert button should be visible."
+    );
+
+    let loaded = BrowserTestUtils.waitForNewTab(gBrowser, null, true);
+    for (let i = 0; i < 2; i++) {
+      checkAndClickButton(pageInfo.document, "security-view-cert");
+      await loaded;
+    }
+
+    pageInfo.close();
+    checkCertTabs();
+  });
+
+  gBrowser.removeCurrentTab();
+});
+
+add_task(async function testPreferencesCert() {
+  info("Testing preferences cert");
+  let url = "about:preferences#privacy";
+
+  info(`Loading ${url}`);
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url },
+    async function (browser) {
+      checkAndClickButton(browser.contentDocument, "viewCertificatesButton");
+
+      let certDialogLoaded = promiseLoadSubDialog(
+        "chrome://pippki/content/certManager.xhtml"
+      );
+      let dialogWin = await certDialogLoaded;
+      let doc = dialogWin.document;
+      Assert.ok(doc, "doc loaded");
+
+      doc.getElementById("certmanagertabs").selectedTab =
+        doc.getElementById("ca_tab");
+      let treeView = doc.getElementById("ca-tree").view;
+      let selectedCert;
+
+      for (let i = 0; i < treeView.rowCount; i++) {
+        treeView.selection.select(i);
+        dialogWin.getSelectedCerts();
+        let certs = dialogWin.selected_certs;
+        if (certs && certs.length == 1 && certs[0]) {
+          selectedCert = certs[0];
+          break;
+        }
+      }
+      Assert.ok(selectedCert, "A cert should be selected");
+      let viewButton = doc.getElementById("ca_viewButton");
+      Assert.equal(viewButton.disabled, false, "Should enable view button");
+
+      let loaded = BrowserTestUtils.waitForNewTab(gBrowser, null, true);
+      for (let i = 0; i < 2; i++) {
+        viewButton.click();
+        await loaded;
+      }
+      checkCertTabs();
+    }
+  );
+  gBrowser.removeCurrentTab(); // closes about:certificate
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_checkNonUndefinedStrings.js b/toolkit/components/certviewer/tests/browser/browser_checkNonUndefinedStrings.js
new file mode 100644
index 0000000000..5e76990592
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_checkNonUndefinedStrings.js
@@ -0,0 +1,49 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const url =
+  "about:certificate?cert=MIIGRjCCBS6gAwIBAgIQDJduPkI49CDWPd%2BG7%2Bu6kDANBgkqhkiG9w0BAQsFADBNMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMScwJQYDVQQDEx5EaWdpQ2VydCBTSEEyIFNlY3VyZSBTZXJ2ZXIgQ0EwHhcNMTgxMTA1MDAwMDAwWhcNMTkxMTEzMTIwMDAwWjCBgzELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDU1vdW50YWluIFZpZXcxHDAaBgNVBAoTE01vemlsbGEgQ29ycG9yYXRpb24xDzANBgNVBAsTBldlYk9wczEYMBYGA1UEAxMPd3d3Lm1vemlsbGEub3JnMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuKruymkkmkqCJh7QjmXlUOBcLFRyw5LG%2FvUUWVrsxC2gsbR8WJq%2BcYoYBpoNVStKrO4U2rBh1GEbccvT6qKOQI%2BpjjDxx9cmRdubGTGp8L0MF1ohVvhIvYLumOEoRDDPU4PvGJjGhek%2FojvedPWe8dhciHkxOC2qPFZvVFMwg1%2Fo%2Fb80147BwZQmzB18mnHsmcyKlpsCN8pxw86uao9Iun8gZQrsllW64rTZlRR56pHdAcuGAoZjYZxwS9Z%2BlvrSjEgrddemWyGGalqyFp1rXlVM1Tf4%2FIYWAQXTgTUN303u3xMjss7QK7eUDsACRxiWPLW9XQDd1c%2ByvaYJKzgJ2wIDAQABo4IC6TCCAuUwHwYDVR0jBBgwFoAUD4BhHIIxYdUvKOeNRji0LOHG2eIwHQYDVR0OBBYEFNpSvSGcN2VT%2FB9TdQ8eXwebo60%2FMCcGA1UdEQQgMB6CD3d3dy5tb3ppbGxhLm9yZ4ILbW96aWxsYS5vcmcwDgYDVR0PAQH%2FBAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjBrBgNVHR8EZDBiMC%2BgLaArhilodHRwOi8vY3JsMy5kaWdpY2VydC5jb20vc3NjYS1zaGEyLWc2LmNybDAvoC2gK4YpaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NzY2Etc2hhMi1nNi5jcmwwTAYDVR0gBEUwQzA3BglghkgBhv1sAQEwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cuZGlnaWNlcnQuY29tL0NQUzAIBgZngQwBAgIwfAYIKwYBBQUHAQEEcDBuMCQGCCsGAQUFBzABhhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wRgYIKwYBBQUHMAKGOmh0dHA6Ly9jYWNlcnRzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydFNIQTJTZWN1cmVTZXJ2ZXJDQS5jcnQwDAYDVR0TAQH%2FBAIwADCCAQIGCisGAQQB1nkCBAIEgfMEgfAA7gB1AKS5CZC0GFgUh7sTosxncAo8NZgE%2BRvfuON3zQ7IDdwQAAABZuYWiHwAAAQDAEYwRAIgZnMSH1JdG6NASHWTwD0mlP%2Fzbr0hzP263c02Ym0DU64CIEe4QHJDP47j0b6oTFu6RrZz1NQ9cq8Az1KnMKRuaFAlAHUAh3W%2F51l8%2BIxDmV%2B9827%2FVo1HVjb%2FSrVgwbTq%2F16ggw8AAAFm5haJAgAABAMARjBEAiAxGLXkUaOAkZhXNeNR3pWyahZeKmSaMXadgu18SfK1ZAIgKtwu5eGxK76rgaszLCZ9edBIjuU0DKorzPUuxUXFY0QwDQYJKoZIhvcNAQELBQADggEBAKLJAFO3wuaP5MM%2Fed1lhk5Uc2aDokhcM7XyvdhEKSHbgPhcgMoT9YIVoPa70gNC6KHcwoXu0g8wt7X6Vm1ql%2F68G5q844kFuC6JPl4LVT9mciD%2BVW6bHUSXD9xifL9DqdJ0Ic0SllTlM%2Boq5aAeOxUQGXhXIqj6fSQv9fQN6mXxQIoc%2Fgjxteskq%2FVl8YmY1FIZP9Bh7g27kxZ9GAAGQtjTL03RzKAuSg6yeImYVdQWasc7UPnBXlRAzZ8%2BOJThUbzK16a2CI3Rg4agKSJk%2BuA47h1%2FImmngpFLRb%2FMvRX6H1oWcUuyH6O7PZdl0YpwTpw1THIuqCGl%2FwpPgyQgcTM%3D&cert=MIIElDCCA3ygAwIBAgIQAf2j627KdciIQ4tyS8%2B8kTANBgkqhkiG9w0BAQsFADBhMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBDQTAeFw0xMzAzMDgxMjAwMDBaFw0yMzAzMDgxMjAwMDBaME0xCzAJBgNVBAYTAlVTMRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxJzAlBgNVBAMTHkRpZ2lDZXJ0IFNIQTIgU2VjdXJlIFNlcnZlciBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANyuWJBNwcQwFZA1W248ghX1LFy949v%2FcUP6ZCWA1O4Yok3wZtAKc24RmDYXZK83nf36QYSvx6%2BM%2FhpzTc8zl5CilodTgyu5pnVILR1WN3vaMTIa16yrBvSqXUu3R0bdKpPDkC55gIDvEwRqFDu1m5K%2BwgdlTvza%2FP96rtxcflUxDOg5B6TXvi%2FTC2rSsd9f%2Fld0Uzs1gN2ujkSYs58O09rg1%2FRrKatEp0tYhG2SS4HD2nOLEpdIkARFdRrdNzGXkujNVA075ME%2FOV4uuPNcfhCOhkEAjUVmR7ChZc6gqikJTvOX6%2Bguqw9ypzAO%2Bsf0%2FRR3w6RbKFfCs%2FmC%2FbdFWJsCAwEAAaOCAVowggFWMBIGA1UdEwEB%2FwQIMAYBAf8CAQAwDgYDVR0PAQH%2FBAQDAgGGMDQGCCsGAQUFBwEBBCgwJjAkBggrBgEFBQcwAYYYaHR0cDovL29jc3AuZGlnaWNlcnQuY29tMHsGA1UdHwR0MHIwN6A1oDOGMWh0dHA6Ly9jcmwzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RDQS5jcmwwN6A1oDOGMWh0dHA6Ly9jcmw0LmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RDQS5jcmwwPQYDVR0gBDYwNDAyBgRVHSAAMCowKAYIKwYBBQUHAgEWHGh0dHBzOi8vd3d3LmRpZ2ljZXJ0LmNvbS9DUFMwHQYDVR0OBBYEFA%2BAYRyCMWHVLyjnjUY4tCzhxtniMB8GA1UdIwQYMBaAFAPeUDVW0Uy7ZvCj4hsbw5eyPdFVMA0GCSqGSIb3DQEBCwUAA4IBAQAjPt9L0jFCpbZ%2BQlwaRMxp0Wi0XUvgBCFsS%2BJtzLHgl4%2BmUwnNqipl5TlPHoOlblyYoiQm5vuh7ZPHLgLGTUq%2FsELfeNqzqPlt%2FyGFUzZgTHbO7Djc1lGA8MXW5dRNJ2Srm8c%2BcftIl7gzbckTB%2B6WohsYFfZcTEDts8Ls%2F3HB40f%2F1LkAtDdC2iDJ6m6K7hQGrn2iWZiIqBtvLfTyyRRfJs8sjX7tN8Cp1Tm5gr8ZDOo0rwAhaPitc%2BLJMto4JQtV05od8GiG7S5BNO98pVAdvzr508EIDObtHopYJeS4d60tbvVS3bR0j6tJLp07kzQoH3jOlOrHvdPJbRzeXDLz&cert=MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBhMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBDQTAeFw0wNjExMTAwMDAwMDBaFw0zMTExMTAwMDAwMDBaMGExCzAJBgNVBAYTAlVTMRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5jb20xIDAeBgNVBAMTF0RpZ2lDZXJ0IEdsb2JhbCBSb290IENBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4jvhEXLeqKTTo1eqUKKPC3eQyaKl7hLOllsBCSDMAZOnTjC3U%2FdDxGkAV53ijSLdhwZAAIEJzs4bg7%2FfzTtxRuLWZscFs3YnFo97nh6Vfe63SKMI2tavegw5BmV%2FSl0fvBf4q77uKNd0f3p4mVmFaG5cIzJLv07A6Fpt43C%2FdxC%2F%2FAH2hdmoRBBYMql1GNXRor5H4idq9Joz%2BEkIYIvUX7Q6hL%2BhqkpMfT7PT19sdl6gSzeRntwi5m3OFBqOasv%2BzbMUZBfHWymeMr%2Fy7vrTC0LUq7dBMtoM1O%2F4gdW7jVg%2FtRvoSSiicNoxBN33shbyTApOB6jtSj1etX%2BjkMOvJwIDAQABo2MwYTAOBgNVHQ8BAf8EBAMCAYYwDwYDVR0TAQH%2FBAUwAwEB%2FzAdBgNVHQ4EFgQUA95QNVbRTLtm8KPiGxvDl7I90VUwHwYDVR0jBBgwFoAUA95QNVbRTLtm8KPiGxvDl7I90VUwDQYJKoZIhvcNAQEFBQADggEBAMucN6pIExIK%2Bt1EnE9SsPTfrgT1eXkIoyQY%2FEsrhMAtudXH%2FvTBH1jLuG2cenTnmCmrEbXjcKChzUyImZOMkXDiqw8cvpOp%2F2PV5Adg06O%2FnVsJ8dWO41P0jmP6P6fbtGbfYmbW0W5BjfIttep3Sp%2BdWOIrWcBAI%2B0tKIJFPnlUkiaY4IBIqDfv8NZ5YBberOgOzW6sRBc4L0na4UU%2BKrk2U886UAb3LujEV0lsYSEY1QSteDwsOoBrp%2BuvFRTp2InBuThs4pFsiv9kuXclVzDAGySj4dzp30d8tbQkCAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4%3D";
+
+add_task(async function test() {
+  await BrowserTestUtils.withNewTab(url, async function (browser) {
+    await SpecialPowers.spawn(browser, [], async function () {
+      let certificateSection = await ContentTaskUtils.waitForCondition(() => {
+        return content.document.querySelector("certificate-section");
+      }, "Certificate section found");
+
+      let tabs =
+        certificateSection.shadowRoot.querySelector(
+          ".certificate-tabs"
+        ).children;
+
+      Assert.ok(tabs, "Tabs were found");
+
+      for (let i = 0; i < tabs.length; i++) {
+        let tabButton = certificateSection.shadowRoot.querySelector(
+          `.certificate-tabs .tab[idnumber="${i}"]`
+        );
+        tabButton.click();
+
+        let infoGroups =
+          certificateSection.shadowRoot.querySelectorAll("info-group");
+        Assert.ok(infoGroups, "infoGroups found");
+
+        for (let infoGroup of infoGroups) {
+          let infoItems = infoGroup.shadowRoot.querySelectorAll("info-item");
+          Assert.ok(infoItems, "infoItems found");
+
+          for (let infoItem of infoItems) {
+            let info = infoItem.shadowRoot.children[2].textContent;
+            Assert.equal(
+              info.includes("undefined"),
+              false,
+              "Empty strings shouldn't be rendered"
+            );
+          }
+        }
+      }
+    });
+  });
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_checkOCSP.js b/toolkit/components/certviewer/tests/browser/browser_checkOCSP.js
new file mode 100644
index 0000000000..b7d51842eb
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_checkOCSP.js
@@ -0,0 +1,46 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+async function checkOCSP(url, shouldBeRendered) {
+  await BrowserTestUtils.withNewTab(url, async function (browser) {
+    await SpecialPowers.spawn(
+      browser,
+      [shouldBeRendered],
+      async function (shouldBeRendered) {
+        let certificateSection = await ContentTaskUtils.waitForCondition(() => {
+          return content.document.querySelector("certificate-section");
+        }, "Certificate section found");
+        let OCSPSection =
+          certificateSection.shadowRoot.querySelector(".ocsp-stapling");
+        if (!shouldBeRendered) {
+          Assert.equal(OCSPSection, null, "OCSPSection found");
+          return;
+        }
+        Assert.ok(OCSPSection, "OCSPSection found");
+        let item = OCSPSection.shadowRoot.querySelector("info-item");
+        Assert.ok(item, "item found");
+        let info = item.shadowRoot.querySelector(".info").textContent;
+        Assert.equal(info, "Yes", "OCSP is required");
+      }
+    );
+  });
+}
+
+add_task(async function test() {
+  let tests = [
+    {
+      url: "about:certificate?cert=MIIE1jCCA76gAwIBAgISA8ud4ZkTgHyRgFEI060JNN%2FFMA0GCSqGSIb3DQEBCwUAMEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQDExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEwMjAwODUzMTFaFw0yMDAxMTgwODUzMTFaMB0xGzAZBgNVBAMTEmRtNHByb2R1Y3Rpb25zLmNvbTB2MBAGByqGSM49AgEGBSuBBAAiA2IABAaBrphEFb0WufNLet5XJDrjo3UYUnEhNJZ5LKbbdaMeRHU%2BamVcM%2B%2Fyddoeq56%2FbeZF0p8oKptxg0TQpeVz4b5ZONe17S6Bp17DN0HLqeX6FXLKyVqRTfoesv7XR1KtW6OCAo8wggKLMA4GA1UdDwEB%2FwQEAwIHgDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH%2FBAIwADAdBgNVHQ4EFgQUNXKbW53h63%2Bz%2FBCOyd4pilpoFc8wHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7%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%2FTPfOWVmFv4EdAHYAb1N2rDHwMRnYmQCkURX%2FdxUcEdkCwQApBo2yCJo32RMAAAFt6JXE7wAABAMARzBFAiEAm4lY7Jsj1c%2F%2FzAES61A7hi9jJ5bqQpE1x9KCALQqd4sCIAablaGWv6L3uksVpDH1KDxj1Df9iDPGO2CJSzKjSKdNMA0GCSqGSIb3DQEBCwUAA4IBAQBjP5pR%2Fnj%2FCOZy3Z2LfqN7z%2Fcb87rz0CY7iR5p6PvdvwOs0JPq%2F1pVf4V3JTPmEduP7Z4cYIAoOp2%2BFBE0kZar0zzhp6uXcoBagrlxanG9KvgeWr1hfyJjYbnsteake8Z3vqfjdnlhB5ZFmQudHQh7QAoxtswNbdxjy%2FNwBIR5pKIDxleebVwe%2FneH%2BtokDYSPmH2vsmto0z72VM1KlFjgXC79XDIKMl83R2U%2F1B9wq23EHeFFY38cBUFKEjO67eC9q1Xxsv%2FpYAKrXVkdwwsvHfoY7evFRu%2Fj%2BsS3fWcf8uPrApaoqqJgjxpJ2jHjcXniad47iTffJUmwHqmyeigZ&cert=MIIEkjCCA3qgAwIBAgIQCgFBQgAAAVOFc2oLheynCDANBgkqhkiG9w0BAQsFADA%2FMSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMTDkRTVCBSb290IENBIFgzMB4XDTE2MDMxNzE2NDA0NloXDTIxMDMxNzE2NDA0NlowSjELMAkGA1UEBhMCVVMxFjAUBgNVBAoTDUxldCdzIEVuY3J5cHQxIzAhBgNVBAMTGkxldCdzIEVuY3J5cHQgQXV0aG9yaXR5IFgzMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnNMM8FrlLke3cl03g7NoYzDq1zUmGSXhvb418XCSL7e4S0EFq6meNQhY7LEqxGiHC6PjdeTm86dicbp5gWAf15Gan%2FPQeGdxyGkOlZHP%2FuaZ6WA8SMx%2Byk13EiSdRxta67nsHjcAHJyse6cF6s5K671B5TaYucv9bTyWaN8jKkKQDIZ0Z8h%2FpZq4UmEUEz9l6YKHy9v6Dlb2honzhT%2BXhq%2Bw3Brvaw2VFn3EK6BlspkENnWAa6xK8xuQSXgvopZPKiAlKQTGdMDQMc2PMTiVFrqoM7hD8bEfwzB%2FonkxEz0tNvjj%2FPIzark5McWvxI0NHWQWM6r6hCm21AvA2H3DkwIDAQABo4IBfTCCAXkwEgYDVR0TAQH%2FBAgwBgEB%2FwIBADAOBgNVHQ8BAf8EBAMCAYYwfwYIKwYBBQUHAQEEczBxMDIGCCsGAQUFBzABhiZodHRwOi8vaXNyZy50cnVzdGlkLm9jc3AuaWRlbnRydXN0LmNvbTA7BggrBgEFBQcwAoYvaHR0cDovL2FwcHMuaWRlbnRydXN0LmNvbS9yb290cy9kc3Ryb290Y2F4My5wN2MwHwYDVR0jBBgwFoAUxKexpHsscfrb4UuQdf%2FEFWCFiRAwVAYDVR0gBE0wSzAIBgZngQwBAgEwPwYLKwYBBAGC3xMBAQEwMDAuBggrBgEFBQcCARYiaHR0cDovL2Nwcy5yb290LXgxLmxldHNlbmNyeXB0Lm9yZzA8BgNVHR8ENTAzMDGgL6AthitodHRwOi8vY3JsLmlkZW50cnVzdC5jb20vRFNUUk9PVENBWDNDUkwuY3JsMB0GA1UdDgQWBBSoSmpjBH3duubRObemRWXv86jsoTANBgkqhkiG9w0BAQsFAAOCAQEA3TPXEfNjWDjdGBX7CVW%2Bdla5cEilaUcne8IkCJLxWh9KEik3JHRRHGJouM2VcGfl96S8TihRzZvoroed6ti6WqEBmtzw3Wodatg%2BVyOeph4EYpr%2F1wXKtx8%2FwApIvJSwtmVi4MFU5aMqrSDE6ea73Mj2tcMyo5jMd6jmeWUHK8so%2FjoWUoHOUgwuX4Po1QYz%2B3dszkDqMp4fklxBwXRsW10KXzPMTZ%2BsOPAveyxindmjkW8lGy%2BQsRlGPfZ%2BG6Z6h7mjem0Y%2BiWlkYcV4PIWL1iwBi8saCbGS5jN2p8M%2BX%2BQ7UNKEkROb3N6KOqkqm57TH2H3eDJAkSnh6%2FDNFu0Qg%3D%3D&cert=MIIDSjCCAjKgAwIBAgIQRK%2BwgNajJ7qJMDmGLvhAazANBgkqhkiG9w0BAQUFADA%2FMSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMTDkRTVCBSb290IENBIFgzMB4XDTAwMDkzMDIxMTIxOVoXDTIxMDkzMDE0MDExNVowPzEkMCIGA1UEChMbRGlnaXRhbCBTaWduYXR1cmUgVHJ1c3QgQ28uMRcwFQYDVQQDEw5EU1QgUm9vdCBDQSBYMzCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAN%2Bv6ZdQCINXtMxiZfaQguzH0yxrMMpb7NnDfcdAwRgUi%2BDoM3ZJKuM%2FIUmTrE4Orz5Iy2Xu%2FNMhD2XSKtkyj4zl93ewEnu1lcCJo6m67XMuegwGMoOifooUMM0RoOEqOLl5CjH9UL2AZd%2B3UWODyOKIYepLYYHsUmu5ouJLGiifSKOeDNoJjj4XLh7dIN9bxiqKqy69cK3FCxolkHRyxXtqqzTWMIn%2F5WgTe1QLyNau7Fqckh49ZLOMxt%2B%2FyUFw7BZy1SbsOFU5Q9D8%2FRhcQPGX69Wam40dutolucbY38EVAjqr2m7xPi71XAicPNaDaeQQmxkqtilX4%2BU9m5%2FwAl0CAwEAAaNCMEAwDwYDVR0TAQH%2FBAUwAwEB%2FzAOBgNVHQ8BAf8EBAMCAQYwHQYDVR0OBBYEFMSnsaR7LHH62%2BFLkHX%2FxBVghYkQMA0GCSqGSIb3DQEBBQUAA4IBAQCjGiybFwBcqR7uKGY3Or%2BDxz9LwwmglSBd49lZRNI%2BDT69ikugdB%2FOEIKcdBodfpga3csTS7MgROSR6cz8faXbauX%2B5v3gTt23ADq1cEmv8uXrAvHRAosZy5Q6XkjEGB5YGV8eAlrwDPGxrancWYaLbumR9YbK%2BrlmM6pZW87ipxZzR8srzJmwN0jP41ZL9c8PDHIyh8bwRLtTcm1D9SZImlJnt1ir%2Fmd2cXjbDaJWFBM5JDGFoqgCWjBH4d1QB7wCCZAA62RjYJsWvIjJEubSfZGL%2BT0yjWW06XyxV3bqxbYoOb8VZRzI9neWagqNdwvYkQsEjgfbKbYK7p2CNTUQ",
+      shouldBeRendered: true,
+    },
+    {
+      url: "about:certificate?cert=MIIE0DCCBHegAwIBAgIQCP0zdXA01ESx6eTjfitzfzAKBggqhkjOPQQDAjBvMQswCQYDVQQGEwJVUzELMAkGA1UECBMCQ0ExFjAUBgNVBAcTDVNhbiBGcmFuY2lzY28xGTAXBgNVBAoTEENsb3VkRmxhcmUsIEluYy4xIDAeBgNVBAMTF0Nsb3VkRmxhcmUgSW5jIEVDQyBDQS0yMB4XDTE5MDUwMzAwMDAwMFoXDTIwMDUwMzEyMDAwMFowaDELMAkGA1UEBhMCVVMxCzAJBgNVBAgTAkNBMRYwFAYDVQQHEw1TYW4gRnJhbmNpc2NvMRkwFwYDVQQKExBDbG91ZEZsYXJlLCBJbmMuMRkwFwYDVQQDExBzY290dGhlbG1lLmNvLnVrMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEYQYIOYOkA0SNAxlrsvTnr7BIOoNmUaBFG2oXXyKfphkc%2F5wXXMU1Ez1%2BpqjFHSwaAtCkgTzTNEEOxkuDicJLqKOCAvowggL2MB8GA1UdIwQYMBaAFD50LR%2FPRXUEfj%2FAooc%2BTEODURPGMB0GA1UdDgQWBBSlm2TM83mhbWzqLL2SZRmdHbh%2FWDAvBgNVHREEKDAmghBzY290dGhlbG1lLmNvLnVrghIqLnNjb3R0aGVsbWUuY28udWswDgYDVR0PAQH%2FBAQDAgeAMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjB5BgNVHR8EcjBwMDagNKAyhjBodHRwOi8vY3JsMy5kaWdpY2VydC5jb20vQ2xvdWRGbGFyZUluY0VDQ0NBMi5jcmwwNqA0oDKGMGh0dHA6Ly9jcmw0LmRpZ2ljZXJ0LmNvbS9DbG91ZEZsYXJlSW5jRUNDQ0EyLmNybDBMBgNVHSAERTBDMDcGCWCGSAGG%2FWwBATAqMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy5kaWdpY2VydC5jb20vQ1BTMAgGBmeBDAECAjB2BggrBgEFBQcBAQRqMGgwJAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTBABggrBgEFBQcwAoY0aHR0cDovL2NhY2VydHMuZGlnaWNlcnQuY29tL0Nsb3VkRmxhcmVJbmNFQ0NDQS0yLmNydDAMBgNVHRMBAf8EAjAAMIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHUA7ku9t3XOYLrhQmkfq%2BGeZqMPfl%2BwctiDAMR7iXqo%2FcsAAAFqfaV7eQAABAMARjBEAiAcD2ch9qAysZxlIFqrYjElyv%2B6fPbwBZ%2BCFSgJW7d4cgIgUnpOdauBy9OXIeQerY0ElxqlPDFo0qTx34NBoPmfyOYAdgBep3P531bA57U2SH3QSeAyepGaDIShEhKEGHWWgXFFWAAAAWp9pXsQAAAEAwBHMEUCIQDlDcpBkwV225tooGiDmWX4bwvpko6nmXnQ8RBeSltUGAIgXUCskAznLKPcqf7e55eEj9xwago28rJZny6stP9NqakwCgYIKoZIzj0EAwIDRwAwRAIfVXERnB1UkKpq73xsv0H3o0SC%2FVGdyuIizTc1HHeP6gIhAKSIp4zfgOLP3l46y2yHzir9PdeCc%2BRGUVg4P4IgAANv&cert=MIIDozCCAougAwIBAgIQD%2FPmFjmqPRoSZfQfizTltjANBgkqhkiG9w0BAQsFADBaMQswCQYDVQQGEwJJRTESMBAGA1UEChMJQmFsdGltb3JlMRMwEQYDVQQLEwpDeWJlclRydXN0MSIwIAYDVQQDExlCYWx0aW1vcmUgQ3liZXJUcnVzdCBSb290MB4XDTE1MTAxNDEyMDAwMFoXDTIwMTAwOTEyMDAwMFowbzELMAkGA1UEBhMCVVMxCzAJBgNVBAgTAkNBMRYwFAYDVQQHEw1TYW4gRnJhbmNpc2NvMRkwFwYDVQQKExBDbG91ZEZsYXJlLCBJbmMuMSAwHgYDVQQDExdDbG91ZEZsYXJlIEluYyBFQ0MgQ0EtMjBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABNFW9Jy25DGg9aRSz%2BOaeob%2F8oayXsy1WcwRx07dZP1VnGDjoEvZeFT%2FSFC6ouGhWHWPx2A3RBZNVZns7tQzeiOjggEZMIIBFTASBgNVHRMBAf8ECDAGAQH%2FAgEAMA4GA1UdDwEB%2FwQEAwIBhjA0BggrBgEFBQcBAQQoMCYwJAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTA6BgNVHR8EMzAxMC%2BgLaArhilodHRwOi8vY3JsMy5kaWdpY2VydC5jb20vT21uaXJvb3QyMDI1LmNybDA9BgNVHSAENjA0MDIGBFUdIAAwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cuZGlnaWNlcnQuY29tL0NQUzAdBgNVHQ4EFgQUPnQtH89FdQR%2BP8Cihz5MQ4NRE8YwHwYDVR0jBBgwFoAU5Z1ZMIJHWMys%2BghUNoZ7OrUETfAwDQYJKoZIhvcNAQELBQADggEBADhfp%2F%2F8hfJzMuTVo4mZlmCvMsEDs2Xfvh4DyqXthbKPr0uMc48qjKkADgEkF%2FfsUoV2yOUcecrDF4dQtgQzNp4qnhgXljISr0PMVxje28fYiCWD5coGJTH9vV1IO1EB3SwUx8FgUemVAdiyM1YOR2aNbM2v%2BYXZ6xxHR4g06PD6wqtPaU4JWdRXxszByOPmGcFYOFLi4oOF3iI03D%2Bm968kvOBvwKtoLVLHawVXLEIbLUiHAwyQq0hIqSi%2BNIr7uu30YJkdFXgRqtltU39pKLy3ayB2f6BVA3F59WensKAKF1eyAKmtz%2F9njD4m5ackvMJvEOiJxnCl0h%2BA7Q0%2FJxM%3D&cert=MIIDdzCCAl%2BgAwIBAgIEAgAAuTANBgkqhkiG9w0BAQUFADBaMQswCQYDVQQGEwJJRTESMBAGA1UEChMJQmFsdGltb3JlMRMwEQYDVQQLEwpDeWJlclRydXN0MSIwIAYDVQQDExlCYWx0aW1vcmUgQ3liZXJUcnVzdCBSb290MB4XDTAwMDUxMjE4NDYwMFoXDTI1MDUxMjIzNTkwMFowWjELMAkGA1UEBhMCSUUxEjAQBgNVBAoTCUJhbHRpbW9yZTETMBEGA1UECxMKQ3liZXJUcnVzdDEiMCAGA1UEAxMZQmFsdGltb3JlIEN5YmVyVHJ1c3QgUm9vdDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKMEuyKrmD1X6CZymrV51Cni4eiVgLGw41uOKymaZN%2BhXe2wCQVt2yguzmKiYv60iNoS6zjrIZ3AQSsBUnuId9Mcj8e6uYi1agnnc%2BgRQKfRzMpijS3ljwumUNKoUMMo6vWrJYeKmpYcqWe4PwzV9%2FlSEy%2FCG9VwcPCPwBLKBsua4dnKM3p31vjsufFoREJIE9LAwqSuXmD%2BtqYF%2FLTdB1kC1FkYmGP1pWPgkAx9XbIGevOF6uvUA65ehD5f%2FxXtabz5OTZydc93Uk3zyZAsuT3lySNTPx8kmCFcB5kpvcY67Oduhjprl3RjM71oGDHweI12v%2Fyejl0qhqdNkNwnGjkCAwEAAaNFMEMwHQYDVR0OBBYEFOWdWTCCR1jMrPoIVDaGezq1BE3wMBIGA1UdEwEB%2FwQIMAYBAf8CAQMwDgYDVR0PAQH%2FBAQDAgEGMA0GCSqGSIb3DQEBBQUAA4IBAQCFDF2O5G9RaEIFoN27TyclhAO992T9Ldcw46QQF%2BvaKSm2eT929hkTI7gQCvlYpNRhcL0EYWoSihfVCr3FvDB81ukMJY2GQE%2FszKN%2BOMY3EU%2Ft3WgxjkzSswF07r51XgdIGn9w%2FxZchMB5hbgF%2FX%2B%2BZRGjD8ACtPhSNzkE1akxehi%2FoCr0Epn3o0WC4zxe9Z2etciefC7IpJ5OCBRLbf1wbWsaY71k5h%2B3zvDyny67G7fyUIhzksLi4xaNmjICq44Y3ekQEe5%2BNauQrz4wlHrQMz2nZQ%2F1%2FI6eYs9HRCwBXbsdtTLSR9I4LtD%2Bgdwyah617jzV%2FOeBHRnDJELqYzmp",
+      shouldBeRendered: false,
+    },
+  ];
+
+  for (let test of tests) {
+    await checkOCSP(test.url, test.shouldBeRendered);
+  }
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_checkStandAlonePage.js b/toolkit/components/certviewer/tests/browser/browser_checkStandAlonePage.js
new file mode 100644
index 0000000000..02d8fdc250
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_checkStandAlonePage.js
@@ -0,0 +1,86 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TYPE_CA = 1;
+const TYPE_USER = 2;
+const TYPE_EMAIL = 4;
+const TYPE_SERVER = 8;
+
+add_task(async function test_dbItemDisplayed() {
+  await BrowserTestUtils.openNewForegroundTab(gBrowser, () => {
+    gBrowser.selectedTab = BrowserTestUtils.addTab(
+      gBrowser,
+      "about:certificate"
+    );
+  });
+
+  let categories = [
+    {
+      type: TYPE_CA,
+      tabName: "Authorities",
+      id: "ca",
+    },
+    {
+      type: TYPE_USER,
+      tabName: "Your Certificates",
+      id: "mine",
+    },
+    {
+      type: TYPE_EMAIL,
+      tabName: "People",
+      id: "people",
+    },
+    {
+      type: TYPE_SERVER,
+      tabName: "Servers",
+      id: "servers",
+    },
+  ];
+
+  let certdb = Cc["@mozilla.org/security/x509certdb;1"].getService(
+    Ci.nsIX509CertDB
+  );
+  Assert.ok(certdb, "certdb not null");
+  let certcache = certdb.getCerts();
+  Assert.ok(certcache, "certcache not null");
+
+  for (let cert of certcache) {
+    let category = categories.find(({ type }) => type & cert.certType);
+
+    await SpecialPowers.spawn(
+      gBrowser.selectedBrowser,
+      [cert.displayName, category],
+      async function (displayName, category) {
+        let aboutCertificateSection = await ContentTaskUtils.waitForCondition(
+          () => {
+            return content.document.querySelector("about-certificate-section");
+          },
+          "Found aboutCertificateSection."
+        );
+
+        let tab = aboutCertificateSection.shadowRoot.querySelector(
+          `.certificate-tabs #certificate-viewer-tab-${category.id}`
+        );
+        Assert.ok(tab, `${category.tabName} tab should exist.`);
+        tab.click();
+
+        let certificateItems = aboutCertificateSection.shadowRoot.querySelector(
+          `.info-groups #certificate-viewer-tab-${category.id}`
+        );
+
+        let listItems =
+          certificateItems.shadowRoot.querySelectorAll("list-item");
+
+        let item = Array.from(listItems).find(
+          i =>
+            i.shadowRoot.querySelector(".item-name").textContent == displayName
+        );
+        Assert.ok(item, `${displayName} should be listed`);
+      }
+    );
+  }
+
+  gBrowser.removeCurrentTab(); // closes about:certificate
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_checkValiditySection.js b/toolkit/components/certviewer/tests/browser/browser_checkValiditySection.js
new file mode 100644
index 0000000000..10e82be94a
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_checkValiditySection.js
@@ -0,0 +1,57 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const github_url =
+  "about:certificate?cert=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%2FXqYQkzFMBlXmqkzC%2BFdTRBYyneZw5Pz%2BXWQvL%2B74JW6LsWNc2EF0xCEqLOJuC9zjPAqbr7uroNLghGxYf13YdqbG5oj%2F4x%2BogEG3dF%2FU5YIwVr658DKyESMV6eoYV9mDVfTuJastkqcwero%2B5ZAKfYVMLUEsMwFtoTDJFmVf6JlkOWwsxp1WcQ%2FMRQK1cyqOoUFUgYylgdh3yeCDPeF22Ax8AlQxbcaI%2BGwfQL1FB7Jy%2Bh%2BKjME9lE%2FUpgV6Qt2R1xNSmvFCBWu%2BNFX6epwFP%2FJRbkMfLz0beYFUvmMgLtwVpEPSwIDAQABo4IDeTCCA3UwHwYDVR0jBBgwFoAUPdNQpdagre7zSmAKZdMh1Pj41g8wHQYDVR0OBBYEFMnCU2FmnV%2BrJfQmzQ84mqhJ6kipMCUGA1UdEQQeMByCCmdpdGh1Yi5jb22CDnd3dy5naXRodWIuY29tMA4GA1UdDwEB%2FwQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwdQYDVR0fBG4wbDA0oDKgMIYuaHR0cDovL2NybDMuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDA0oDKgMIYuaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDBLBgNVHSAERDBCMDcGCWCGSAGG%2FWwCATAqMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy5kaWdpY2VydC5jb20vQ1BTMAcGBWeBDAEBMIGIBggrBgEFBQcBAQR8MHowJAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTBSBggrBgEFBQcwAoZGaHR0cDovL2NhY2VydHMuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0U0hBMkV4dGVuZGVkVmFsaWRhdGlvblNlcnZlckNBLmNydDAMBgNVHRMBAf8EAjAAMIIBfgYKKwYBBAHWeQIEAgSCAW4EggFqAWgAdgCkuQmQtBhYFIe7E6LMZ3AKPDWYBPkb37jjd80OyA3cEAAAAWNBYm0KAAAEAwBHMEUCIQDRZp38cTWsWH2GdBpe%2FuPTWnsu%2Fm4BEC2%2BdIcvSykZYgIgCP5gGv6yzaazxBK2NwGdmmyuEFNSg2pARbMJlUFgU5UAdgBWFAaaL9fC7NP14b1Esj7HRna5vJkRXMDvlJhV1onQ3QAAAWNBYm0tAAAEAwBHMEUCIQCi7omUvYLm0b2LobtEeRAYnlIo7n6JxbYdrtYdmPUWJQIgVgw1AZ51vK9ENinBg22FPxb82TvNDO05T17hxXRC2IYAdgC72d%2B8H4pxtZOUI5eqkntHOFeVCqtS6BqQlmQ2jh7RhQAAAWNBYm3fAAAEAwBHMEUCIQChzdTKUU2N%2BXcqcK0OJYrN8EYynloVxho4yPk6Dq3EPgIgdNH5u8rC3UcslQV4B9o0a0w204omDREGKTVuEpxGeOQwDQYJKoZIhvcNAQELBQADggEBAHAPWpanWOW%2Fip2oJ5grAH8mqQfaunuCVE%2Bvac%2B88lkDK%2FLVdFgl2B6kIHZiYClzKtfczG93hWvKbST4NRNHP9LiaQqdNC17e5vNHnXVUGw%2ByxyjMLGqkgepOnZ2Rb14kcTOGp4i5AuJuuaMwXmCo7jUwPwfLe1NUlVBKqg6LK0Hcq4K0sZnxE8HFxiZ92WpV2AVWjRMEc%2F2z2shNoDvxvFUYyY1Oe67xINkmyQKc%2BygSBZzyLnXSFVWmHr3u5dcaaQGGAR42v6Ydr4iL38Hd4dOiBma%2BFXsXBIqWUjbST4VXmdaol7uzFMojA4zkxQDZAvF5XgJlAFadfySna%2Fteik%3D";
+const mozilla_url =
+  "about:certificate?cert=MIIGRjCCBS6gAwIBAgIQDJduPkI49CDWPd%2BG7%2Bu6kDANBgkqhkiG9w0BAQsFADBNMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMScwJQYDVQQDEx5EaWdpQ2VydCBTSEEyIFNlY3VyZSBTZXJ2ZXIgQ0EwHhcNMTgxMTA1MDAwMDAwWhcNMTkxMTEzMTIwMDAwWjCBgzELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDU1vdW50YWluIFZpZXcxHDAaBgNVBAoTE01vemlsbGEgQ29ycG9yYXRpb24xDzANBgNVBAsTBldlYk9wczEYMBYGA1UEAxMPd3d3Lm1vemlsbGEub3JnMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuKruymkkmkqCJh7QjmXlUOBcLFRyw5LG%2FvUUWVrsxC2gsbR8WJq%2BcYoYBpoNVStKrO4U2rBh1GEbccvT6qKOQI%2BpjjDxx9cmRdubGTGp8L0MF1ohVvhIvYLumOEoRDDPU4PvGJjGhek%2FojvedPWe8dhciHkxOC2qPFZvVFMwg1%2Fo%2Fb80147BwZQmzB18mnHsmcyKlpsCN8pxw86uao9Iun8gZQrsllW64rTZlRR56pHdAcuGAoZjYZxwS9Z%2BlvrSjEgrddemWyGGalqyFp1rXlVM1Tf4%2FIYWAQXTgTUN303u3xMjss7QK7eUDsACRxiWPLW9XQDd1c%2ByvaYJKzgJ2wIDAQABo4IC6TCCAuUwHwYDVR0jBBgwFoAUD4BhHIIxYdUvKOeNRji0LOHG2eIwHQYDVR0OBBYEFNpSvSGcN2VT%2FB9TdQ8eXwebo60%2FMCcGA1UdEQQgMB6CD3d3dy5tb3ppbGxhLm9yZ4ILbW96aWxsYS5vcmcwDgYDVR0PAQH%2FBAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjBrBgNVHR8EZDBiMC%2BgLaArhilodHRwOi8vY3JsMy5kaWdpY2VydC5jb20vc3NjYS1zaGEyLWc2LmNybDAvoC2gK4YpaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NzY2Etc2hhMi1nNi5jcmwwTAYDVR0gBEUwQzA3BglghkgBhv1sAQEwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cuZGlnaWNlcnQuY29tL0NQUzAIBgZngQwBAgIwfAYIKwYBBQUHAQEEcDBuMCQGCCsGAQUFBzABhhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wRgYIKwYBBQUHMAKGOmh0dHA6Ly9jYWNlcnRzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydFNIQTJTZWN1cmVTZXJ2ZXJDQS5jcnQwDAYDVR0TAQH%2FBAIwADCCAQIGCisGAQQB1nkCBAIEgfMEgfAA7gB1AKS5CZC0GFgUh7sTosxncAo8NZgE%2BRvfuON3zQ7IDdwQAAABZuYWiHwAAAQDAEYwRAIgZnMSH1JdG6NASHWTwD0mlP%2Fzbr0hzP263c02Ym0DU64CIEe4QHJDP47j0b6oTFu6RrZz1NQ9cq8Az1KnMKRuaFAlAHUAh3W%2F51l8%2BIxDmV%2B9827%2FVo1HVjb%2FSrVgwbTq%2F16ggw8AAAFm5haJAgAABAMARjBEAiAxGLXkUaOAkZhXNeNR3pWyahZeKmSaMXadgu18SfK1ZAIgKtwu5eGxK76rgaszLCZ9edBIjuU0DKorzPUuxUXFY0QwDQYJKoZIhvcNAQELBQADggEBAKLJAFO3wuaP5MM%2Fed1lhk5Uc2aDokhcM7XyvdhEKSHbgPhcgMoT9YIVoPa70gNC6KHcwoXu0g8wt7X6Vm1ql%2F68G5q844kFuC6JPl4LVT9mciD%2BVW6bHUSXD9xifL9DqdJ0Ic0SllTlM%2Boq5aAeOxUQGXhXIqj6fSQv9fQN6mXxQIoc%2Fgjxteskq%2FVl8YmY1FIZP9Bh7g27kxZ9GAAGQtjTL03RzKAuSg6yeImYVdQWasc7UPnBXlRAzZ8%2BOJThUbzK16a2CI3Rg4agKSJk%2BuA47h1%2FImmngpFLRb%2FMvRX6H1oWcUuyH6O7PZdl0YpwTpw1THIuqCGl%2FwpPgyQgcTM%3D";
+const youtube_url =
+  "about:certificate?cert=MIIIIDCCBwigAwIBAgIQGk0sGNQUuaOL9Rii2XQ4yjANBgkqhkiG9w0BAQsFADBUMQswCQYDVQQGEwJVUzEeMBwGA1UEChMVR29vZ2xlIFRydXN0IFNlcnZpY2VzMSUwIwYDVQQDExxHb29nbGUgSW50ZXJuZXQgQXV0aG9yaXR5IEczMB4XDTE5MDYxODA4MjE1OFoXDTE5MDkxMDA4MTUwMFowZjELMAkGA1UEBhMCVVMxEzARBgNVBAgMCkNhbGlmb3JuaWExFjAUBgNVBAcMDU1vdW50YWluIFZpZXcxEzARBgNVBAoMCkdvb2dsZSBMTEMxFTATBgNVBAMMDCouZ29vZ2xlLmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABMRScn8kk6qy3LHVktWZWxm%2FMq4kowlEdxQH40wijThZ%2B%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%2B6qCqNh1Xza9Wlm%2FGDVb%2BKp0PHUZaNDMThFQQqGn2XVi7ZkhqsxTtMw88Nrl97Bi1OsnNPlabhDwxtRyWkNkLdpFxebRz73CsjyoB3cboH%2FZ8sU9LLwXe%2FIJgMkvT7fznKtKSweWV%2BmAYG%2F3KzaIyLrowYpyOsWaYytPJK7ypuk6yOPxuQcQnelotWpuHUBR3mo3FIW56BPCy20KwqwvWoZe27BNxO%2F11Ym%2FPnric2fWXwgmHdkvVqqssUMFs%2BmG2tS%2FpqnR5yZdQL60xOgDq70mVWYgQT4yUTm7i8qvugvNnuSIjjsbelHgbC8f5%2Fx%2Bo2pEyw%2FDYyKw%3D";
+
+async function checValiditySection(url) {
+  await BrowserTestUtils.withNewTab(url, async function (browser) {
+    await SpecialPowers.spawn(browser, [], async function () {
+      let certificateSection = await ContentTaskUtils.waitForCondition(() => {
+        return content.document.querySelector("certificate-section");
+      }, "Certificate section found");
+
+      let validitySection = certificateSection.shadowRoot.querySelector(
+        "info-group.validity"
+      );
+      Assert.ok(validitySection, "validitySection found");
+
+      let infoItems = validitySection.shadowRoot.querySelectorAll("info-item");
+      Assert.ok(infoItems, "infoItems found");
+      Assert.equal(
+        infoItems.length,
+        2,
+        "There must be render just one date for Not Before and one for Not After"
+      );
+
+      for (let infoItem of infoItems) {
+        let label = infoItem.shadowRoot
+          .querySelector("label")
+          .getAttribute("data-l10n-id");
+
+        Assert.notEqual(label, "", "Label shouldn't be empty");
+
+        let infoElem = infoItem.shadowRoot.querySelector(".info");
+        let title = infoElem.textContent;
+        Assert.equal(
+          title.includes("GMT"),
+          true,
+          "UTC timezone should be displayed in the label"
+        );
+      }
+    });
+  });
+}
+
+add_task(async function test() {
+  let input = [github_url, mozilla_url, youtube_url];
+  for (let url of input) {
+    await checValiditySection(url);
+  }
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_downloadLink.js b/toolkit/components/certviewer/tests/browser/browser_downloadLink.js
new file mode 100644
index 0000000000..5b7b587733
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_downloadLink.js
@@ -0,0 +1,126 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const validCert =
+  "about:certificate?cert=MIIGMDCCBRigAwIBAgIQCa2oS7Nau6nwv1WyRNIJnzANBgkqhkiG9w0BAQsFADBwMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMS8wLQYDVQQDEyZEaWdpQ2VydCBTSEEyIEhpZ2ggQXNzdXJhbmNlIFNlcnZlciBDQTAeFw0xOTA2MDYwMDAwMDBaFw0xOTA5MDQxMjAwMDBaMGExCzAJBgNVBAYTAlVTMQswCQYDVQQIEwJDQTETMBEGA1UEBxMKTWVubG8gUGFyazEXMBUGA1UEChMORmFjZWJvb2ssIEluYy4xFzAVBgNVBAMMDiouZmFjZWJvb2suY29tMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEEALPlfjd8gHkIMDeBOFhRt0e%2B%2F3fdm%2BZdzdM4s1WIHVbYztgmdEy20PUwDCviYKJX4GG%2BT9ivT8kJ%2FvWl1P%2FYqOCA54wggOaMB8GA1UdIwQYMBaAFFFo%2F5CvAgd1PMzZZWRiohK4WXI7MB0GA1UdDgQWBBTsQZVRTuib7KY9w3FfOYsZHvOC9zCBxwYDVR0RBIG%2FMIG8gg4qLmZhY2Vib29rLmNvbYINbWVzc2VuZ2VyLmNvbYILKi5mYmNkbi5uZXSCCCouZmIuY29tghAqLm0uZmFjZWJvb2suY29tggZmYi5jb22CDiouZmFjZWJvb2submV0gg4qLnh4LmZiY2RuLm5ldIIOKi54ei5mYmNkbi5uZXSCDyoubWVzc2VuZ2VyLmNvbYILKi5mYnNieC5jb22CDioueHkuZmJjZG4ubmV0ggxmYWNlYm9vay5jb20wDgYDVR0PAQH%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%2FBAIwADCCAQQGCisGAQQB1nkCBAIEgfUEgfIA8AB1AKS5CZC0GFgUh7sTosxncAo8NZgE%2BRvfuON3zQ7IDdwQAAABay5CAaUAAAQDAEYwRAIgMwBM6q%2BdBwu2mNtMMjTEwJZZxyoUlHUEYO%2BbfkId%2F9MCIAQ2bxhnxrapYv74fzyoTkt9m%2BELq6%2B43OVpivRVKDKTAHcAdH7agzGtMxCRIZzOJU9CcMK%2F%2FV5CIAjGNzV55hB7zFYAAAFrLkIA%2FAAABAMASDBGAiEA0x1xPWue6RMSE9nbjYBt637CRC86ixrODP%2FEIlI5mCgCIQCHNdqgOlswd0LqaW4QRii2JHN4bnoEj%2FD9j7%2BkqEB7LjANBgkqhkiG9w0BAQsFAAOCAQEAnRdIVNZ850s7IvLgg%2BU9kKxA18kLKVpIF%2FrJHkXTkymvBHKAGOFNfzqF2YxHFhkDMIuoMO2F%2BA1E0Eo8zb1atL6%2FL59broEHTOH6xFmJAlZW0h6mZg8iRJ9Ae0pTN%2FfowaoN9aFVRnVr9ccKhOdqsXYyEZ3Ze39sEwx7Uau9KhzyuJW12Jh3S%2BZJYUdBADeeJNL5ZXSUFIyjgkwSQZPaaWAzSGHZFt3sWhMjdNoBkjRJFlASLDM3m1ZWsKA47vuXvJc%2FDXT35lC1DJmyhYb9qNPR71a1hJ8TS7vUwdDd%2BdEHiJj2wQLV3m7Tn7YvWyJOEyi4n6%2FrPqT44LZmgK7HWw%3D%3D&cert=MIIEsTCCA5mgAwIBAgIQBOHnpNxc8vNtwCtCuF0VnzANBgkqhkiG9w0BAQsFADBsMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSswKQYDVQQDEyJEaWdpQ2VydCBIaWdoIEFzc3VyYW5jZSBFViBSb290IENBMB4XDTEzMTAyMjEyMDAwMFoXDTI4MTAyMjEyMDAwMFowcDELMAkGA1UEBhMCVVMxFTATBgNVBAoTDERpZ2lDZXJ0IEluYzEZMBcGA1UECxMQd3d3LmRpZ2ljZXJ0LmNvbTEvMC0GA1UEAxMmRGlnaUNlcnQgU0hBMiBIaWdoIEFzc3VyYW5jZSBTZXJ2ZXIgQ0EwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC24C%2FCJAbIbQRf1%2B8KZAayfSImZRauQkCbztyfn3YHPsMwVYcZuU%2BUDlqUH1VWtMICKq%2FQmO4LQNfE0DtyyBSe75CxEamu0si4QzrZCwvV1ZX1QK%2FIHe1NnF9Xt4ZQaJn1itrSxwUfqJfJ3KSxgoQtxq2lnMcZgqaFD15EWCo3j%2F018QsIJzJa9buLnqS9UdAn4t07QjOjBSjEuyjMmqwrIw14xnvmXnG3Sj4I%2B4G3FhahnSMSTeXXkgisdaScus0Xsh5ENWV%2FUyU50RwKmmMbGZJ0aAo3wsJSSMs5WqK24V3B3aAguCGikyZvFEohQcftbZvySC%2FzA%2FWiaJJTL17jAgMBAAGjggFJMIIBRTASBgNVHRMBAf8ECDAGAQH%2FAgEAMA4GA1UdDwEB%2FwQEAwIBhjAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwNAYIKwYBBQUHAQEEKDAmMCQGCCsGAQUFBzABhhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wSwYDVR0fBEQwQjBAoD6gPIY6aHR0cDovL2NybDQuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0SGlnaEFzc3VyYW5jZUVWUm9vdENBLmNybDA9BgNVHSAENjA0MDIGBFUdIAAwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cuZGlnaWNlcnQuY29tL0NQUzAdBgNVHQ4EFgQUUWj%2FkK8CB3U8zNllZGKiErhZcjswHwYDVR0jBBgwFoAUsT7DaQP4v0cB1JgmGggC72NkK8MwDQYJKoZIhvcNAQELBQADggEBABiKlYkD5m3fXPwdaOpKj4PWUS%2BNa0QWnqxj9dJubISZi6qBcYRb7TROsLd5kinMLYBq8I4g4Xmk%2FgNHE%2Br1hspZcX30BJZr01lYPf7TMSVcGDiEo%2Bafgv2MW5gxTs14nhr9hctJqvIni5ly%2FD6q1UEL2tU2ob8cbkdJf17ZSHwD2f2LSaCYJkJA69aSEaRkCldUxPUd1gJea6zuxICaEnL6VpPX%2F78whQYwvwt%2FTv9XBZ0k7YXDK%2FumdaisLRbvfXknsuvCnQsH6qqF0wGjIChBWUMo0oHjqvbsezt3tkBigAVBRQHvFwY%2B3sAzm2fTYS5yh%2BRp%2FBIAV0AecPUeybQ%3D&cert=MIIDxTCCAq2gAwIBAgIQAqxcJmoLQJuPC3nyrkYldzANBgkqhkiG9w0BAQUFADBsMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3d3cuZGlnaWNlcnQuY29tMSswKQYDVQQDEyJEaWdpQ2VydCBIaWdoIEFzc3VyYW5jZSBFViBSb290IENBMB4XDTA2MTExMDAwMDAwMFoXDTMxMTExMDAwMDAwMFowbDELMAkGA1UEBhMCVVMxFTATBgNVBAoTDERpZ2lDZXJ0IEluYzEZMBcGA1UECxMQd3d3LmRpZ2ljZXJ0LmNvbTErMCkGA1UEAxMiRGlnaUNlcnQgSGlnaCBBc3N1cmFuY2UgRVYgUm9vdCBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMbM5XPm%2B9S75S0tMqbf5YE%2Fyc0lSbZxKsPVlDRnogocsF9ppkCxxLeyj9CYpKlBWTrT3JTWPNt0OKRKzE0lgvdKpVMSOO7zSW1xkX5jtqumX8OkhPhPYlG%2B%2BMXs2ziS4wblCJEMxChBVfvLWokVfnHoNb9Ncgk9vjo4UFt3MRuNs8ckRZqnrG0AFFoEt7oT61EKmEFBIk5lYYeBQVCmeVyJ3hlKV9Uu5l0cUyx%2BmM0aBhakaHPQNAQTXKFx01p8VdteZOE3hzBWBOURtCmAEvF5OYiiAhF8J2a3iLd48soKqDirCmTCv2ZdlYTBoSUeh10aUAsgEsxBu24LUTi4S8sCAwEAAaNjMGEwDgYDVR0PAQH%2FBAQDAgGGMA8GA1UdEwEB%2FwQFMAMBAf8wHQYDVR0OBBYEFLE%2Bw2kD%2BL9HAdSYJhoIAu9jZCvDMB8GA1UdIwQYMBaAFLE%2Bw2kD%2BL9HAdSYJhoIAu9jZCvDMA0GCSqGSIb3DQEBBQUAA4IBAQAcGgaX3NecnzyIZgYIVyHbIUf4KmeqvxgydkAQV8GK83rZEWWONfqe%2FEW1ntlMMUu4kehDLI6zeM7b41N5cdblIZQB2lWHmiRk9opmzN6cN82oNLFpmyPInngiK3BD41VHMWEZ71jFhS9OMPagMRYjyOfiZRYzy78aG6A9%2BMpeizGLYAiJLQwGXFK3xPkKmNEVX58Svnw2Yzi9RKR%2F5CYrCsSXaQ3pjOLAEFe4yHYSkVXySGnYvCoCWw9E1CAx2%2FS6cCZdkGCevEsXCS%2B0yx5DaMkHJ8HSXPfqIbloEpw8nL%2Be%2FIBcm2PN7EeqJSdnoDfzAIJ9VNep%2BOkuE6N36B9K";
+
+add_task(async function test_checkForErrorSection() {
+  await BrowserTestUtils.openNewForegroundTab(gBrowser, () => {
+    gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser, validCert);
+  });
+
+  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], async function () {
+    let infoGroups;
+    let downloadLinkContainers = [];
+
+    await ContentTaskUtils.waitForCondition(() => {
+      infoGroups = content.document
+        .querySelector("certificate-section")
+        .shadowRoot.querySelectorAll(".miscellaneous");
+      for (let i = 0; i < infoGroups.length; i++) {
+        downloadLinkContainers.push(
+          infoGroups[i].shadowRoot
+            .querySelector(".download")
+            .shadowRoot.querySelector(".info")
+        );
+      }
+      return downloadLinkContainers.length;
+    }, "Found download info items.");
+
+    ok(downloadLinkContainers.length, "Download info items should exist.");
+
+    let certTabs = content.document
+      .querySelector("certificate-section")
+      .shadowRoot.querySelectorAll(".certificate-tab");
+
+    await ContentTaskUtils.waitForCondition(
+      () => certTabs.length,
+      "Certificate tabs should exist."
+    );
+
+    let url = new URL(content.document.documentURI);
+    let certs = url.searchParams.getAll("cert");
+    let certChain = [];
+    for (let i = 0; i < certs.length; i++) {
+      certChain.push(
+        `-----BEGIN CERTIFICATE-----\r\n${certs[i]}\r\n-----END CERTIFICATE-----\r\n`
+      );
+    }
+    certChain = certChain.join("").replace(/(\r\n|\n|\r)/gm, "");
+
+    for (let i = 0; i < certTabs.length; i++) {
+      let downloadLink =
+        downloadLinkContainers[i].querySelector(".download-link");
+
+      let downloadChainLink = downloadLinkContainers[i].querySelector(
+        ".download-link-chain"
+      );
+
+      let cert = certs[i];
+      cert = `-----BEGIN CERTIFICATE-----\r\n${cert}\r\n-----END CERTIFICATE-----\r\n`;
+      cert = cert.replace(/(\r\n|\n|\r)/gm, "");
+
+      let linkCert = downloadLink.getAttribute("href");
+      linkCert = linkCert.replace("data:,", "");
+      linkCert = decodeURI(linkCert);
+      let certLineLength = Math.max(
+        ...linkCert.split(/\r\n|\n|\r/m).map(x => x.length)
+      );
+      linkCert = linkCert.replace(/(\r\n|\n|\r)/gm, "");
+
+      let downloadChainCert = downloadChainLink.getAttribute("href");
+      downloadChainCert = downloadChainCert.replace("data:,", "");
+      downloadChainCert = decodeURI(downloadChainCert);
+      let chainLineLength = Math.max(
+        ...downloadChainCert.split(/\r\n|\n|\r/m).map(x => x.length)
+      );
+      downloadChainCert = downloadChainCert.replace(/(\r\n|\n|\r)/gm, "");
+
+      Assert.lessOrEqual(
+        certLineLength,
+        64,
+        "PEM cert line length should be capped to 64"
+      );
+      Assert.lessOrEqual(
+        chainLineLength,
+        64,
+        "PEM chain line length should be capped to 64"
+      );
+
+      Assert.equal(
+        cert,
+        linkCert,
+        "Download link href should be equal to URL cert."
+      );
+
+      Assert.equal(
+        certChain,
+        downloadChainCert,
+        "Download chain link href should be equal to URL cert."
+      );
+
+      await content.document.l10n.translateElements([
+        downloadChainLink,
+        downloadLink,
+      ]);
+
+      Assert.equal(
+        downloadLinkContainers[i].textContent,
+        "PEM (cert)PEM (chain)",
+        "Download should contain links to PEM cert and PEM chain."
+      );
+
+      if (certTabs[i + 1]) {
+        certTabs[i + 1].click();
+
+        await ContentTaskUtils.waitForCondition(
+          () => certTabs[i + 1].classList.contains("selected"),
+          "Cert tab should be selected"
+        );
+      }
+    }
+  });
+  gBrowser.removeCurrentTab(); // closes about:certificate
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_handleMultipleCertsURL.js b/toolkit/components/certviewer/tests/browser/browser_handleMultipleCertsURL.js
new file mode 100644
index 0000000000..b0199cce83
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_handleMultipleCertsURL.js
@@ -0,0 +1,251 @@
+// valids
+const multipleCerts1 =
+  "about:certificate?cert=MIIGRjCCBS6gAwIBAgIQDJduPkI49CDWPd%2BG7%2Bu6kDANBgkqhkiG9w0BAQsFADBNMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMScwJQYDVQQDEx5EaWdpQ2VydCBTSEEyIFNlY3VyZSBTZXJ2ZXIgQ0EwHhcNMTgxMTA1MDAwMDAwWhcNMTkxMTEzMTIwMDAwWjCBgzELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDU1vdW50YWluIFZpZXcxHDAaBgNVBAoTE01vemlsbGEgQ29ycG9yYXRpb24xDzANBgNVBAsTBldlYk9wczEYMBYGA1UEAxMPd3d3Lm1vemlsbGEub3JnMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuKruymkkmkqCJh7QjmXlUOBcLFRyw5LG%2FvUUWVrsxC2gsbR8WJq%2BcYoYBpoNVStKrO4U2rBh1GEbccvT6qKOQI%2BpjjDxx9cmRdubGTGp8L0MF1ohVvhIvYLumOEoRDDPU4PvGJjGhek%2FojvedPWe8dhciHkxOC2qPFZvVFMwg1%2Fo%2Fb80147BwZQmzB18mnHsmcyKlpsCN8pxw86uao9Iun8gZQrsllW64rTZlRR56pHdAcuGAoZjYZxwS9Z%2BlvrSjEgrddemWyGGalqyFp1rXlVM1Tf4%2FIYWAQXTgTUN303u3xMjss7QK7eUDsACRxiWPLW9XQDd1c%2ByvaYJKzgJ2wIDAQABo4IC6TCCAuUwHwYDVR0jBBgwFoAUD4BhHIIxYdUvKOeNRji0LOHG2eIwHQYDVR0OBBYEFNpSvSGcN2VT%2FB9TdQ8eXwebo60%2FMCcGA1UdEQQgMB6CD3d3dy5tb3ppbGxhLm9yZ4ILbW96aWxsYS5vcmcwDgYDVR0PAQH%2FBAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjBrBgNVHR8EZDBiMC%2BgLaArhilodHRwOi8vY3JsMy5kaWdpY2VydC5jb20vc3NjYS1zaGEyLWc2LmNybDAvoC2gK4YpaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NzY2Etc2hhMi1nNi5jcmwwTAYDVR0gBEUwQzA3BglghkgBhv1sAQEwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cuZGlnaWNlcnQuY29tL0NQUzAIBgZngQwBAgIwfAYIKwYBBQUHAQEEcDBuMCQGCCsGAQUFBzABhhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wRgYIKwYBBQUHMAKGOmh0dHA6Ly9jYWNlcnRzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydFNIQTJTZWN1cmVTZXJ2ZXJDQS5jcnQwDAYDVR0TAQH%2FBAIwADCCAQIGCisGAQQB1nkCBAIEgfMEgfAA7gB1AKS5CZC0GFgUh7sTosxncAo8NZgE%2BRvfuON3zQ7IDdwQAAABZuYWiHwAAAQDAEYwRAIgZnMSH1JdG6NASHWTwD0mlP%2Fzbr0hzP263c02Ym0DU64CIEe4QHJDP47j0b6oTFu6RrZz1NQ9cq8Az1KnMKRuaFAlAHUAh3W%2F51l8%2BIxDmV%2B9827%2FVo1HVjb%2FSrVgwbTq%2F16ggw8AAAFm5haJAgAABAMARjBEAiAxGLXkUaOAkZhXNeNR3pWyahZeKmSaMXadgu18SfK1ZAIgKtwu5eGxK76rgaszLCZ9edBIjuU0DKorzPUuxUXFY0QwDQYJKoZIhvcNAQELBQADggEBAKLJAFO3wuaP5MM%2Fed1lhk5Uc2aDokhcM7XyvdhEKSHbgPhcgMoT9YIVoPa70gNC6KHcwoXu0g8wt7X6Vm1ql%2F68G5q844kFuC6JPl4LVT9mciD%2BVW6bHUSXD9xifL9DqdJ0Ic0SllTlM%2Boq5aAeOxUQGXhXIqj6fSQv9fQN6mXxQIoc%2Fgjxteskq%2FVl8YmY1FIZP9Bh7g27kxZ9GAAGQtjTL03RzKAuSg6yeImYVdQWasc7UPnBXlRAzZ8%2BOJThUbzK16a2CI3Rg4agKSJk%2BuA47h1%2FImmngpFLRb%2FMvRX6H1oWcUuyH6O7PZdl0YpwTpw1THIuqCGl%2FwpPgyQgcTM%3D&cert=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%2FXqYQkzFMBlXmqkzC%2BFdTRBYyneZw5Pz%2BXWQvL%2B74JW6LsWNc2EF0xCEqLOJuC9zjPAqbr7uroNLghGxYf13YdqbG5oj%2F4x%2BogEG3dF%2FU5YIwVr658DKyESMV6eoYV9mDVfTuJastkqcwero%2B5ZAKfYVMLUEsMwFtoTDJFmVf6JlkOWwsxp1WcQ%2FMRQK1cyqOoUFUgYylgdh3yeCDPeF22Ax8AlQxbcaI%2BGwfQL1FB7Jy%2Bh%2BKjME9lE%2FUpgV6Qt2R1xNSmvFCBWu%2BNFX6epwFP%2FJRbkMfLz0beYFUvmMgLtwVpEPSwIDAQABo4IDeTCCA3UwHwYDVR0jBBgwFoAUPdNQpdagre7zSmAKZdMh1Pj41g8wHQYDVR0OBBYEFMnCU2FmnV%2BrJfQmzQ84mqhJ6kipMCUGA1UdEQQeMByCCmdpdGh1Yi5jb22CDnd3dy5naXRodWIuY29tMA4GA1UdDwEB%2FwQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwdQYDVR0fBG4wbDA0oDKgMIYuaHR0cDovL2NybDMuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDA0oDKgMIYuaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDBLBgNVHSAERDBCMDcGCWCGSAGG%2FWwCATAqMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy5kaWdpY2VydC5jb20vQ1BTMAcGBWeBDAEBMIGIBggrBgEFBQcBAQR8MHowJAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTBSBggrBgEFBQcwAoZGaHR0cDovL2NhY2VydHMuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0U0hBMkV4dGVuZGVkVmFsaWRhdGlvblNlcnZlckNBLmNydDAMBgNVHRMBAf8EAjAAMIIBfgYKKwYBBAHWeQIEAgSCAW4EggFqAWgAdgCkuQmQtBhYFIe7E6LMZ3AKPDWYBPkb37jjd80OyA3cEAAAAWNBYm0KAAAEAwBHMEUCIQDRZp38cTWsWH2GdBpe%2FuPTWnsu%2Fm4BEC2%2BdIcvSykZYgIgCP5gGv6yzaazxBK2NwGdmmyuEFNSg2pARbMJlUFgU5UAdgBWFAaaL9fC7NP14b1Esj7HRna5vJkRXMDvlJhV1onQ3QAAAWNBYm0tAAAEAwBHMEUCIQCi7omUvYLm0b2LobtEeRAYnlIo7n6JxbYdrtYdmPUWJQIgVgw1AZ51vK9ENinBg22FPxb82TvNDO05T17hxXRC2IYAdgC72d%2B8H4pxtZOUI5eqkntHOFeVCqtS6BqQlmQ2jh7RhQAAAWNBYm3fAAAEAwBHMEUCIQChzdTKUU2N%2BXcqcK0OJYrN8EYynloVxho4yPk6Dq3EPgIgdNH5u8rC3UcslQV4B9o0a0w204omDREGKTVuEpxGeOQwDQYJKoZIhvcNAQELBQADggEBAHAPWpanWOW%2Fip2oJ5grAH8mqQfaunuCVE%2Bvac%2B88lkDK%2FLVdFgl2B6kIHZiYClzKtfczG93hWvKbST4NRNHP9LiaQqdNC17e5vNHnXVUGw%2ByxyjMLGqkgepOnZ2Rb14kcTOGp4i5AuJuuaMwXmCo7jUwPwfLe1NUlVBKqg6LK0Hcq4K0sZnxE8HFxiZ92WpV2AVWjRMEc%2F2z2shNoDvxvFUYyY1Oe67xINkmyQKc%2BygSBZzyLnXSFVWmHr3u5dcaaQGGAR42v6Ydr4iL38Hd4dOiBma%2BFXsXBIqWUjbST4VXmdaol7uzFMojA4zkxQDZAvF5XgJlAFadfySna%2Fteik%3D";
+const multipleCerts2 =
+  "about:certificate?cert=MIIIIDCCBwigAwIBAgIQGk0sGNQUuaOL9Rii2XQ4yjANBgkqhkiG9w0BAQsFADBUMQswCQYDVQQGEwJVUzEeMBwGA1UEChMVR29vZ2xlIFRydXN0IFNlcnZpY2VzMSUwIwYDVQQDExxHb29nbGUgSW50ZXJuZXQgQXV0aG9yaXR5IEczMB4XDTE5MDYxODA4MjE1OFoXDTE5MDkxMDA4MTUwMFowZjELMAkGA1UEBhMCVVMxEzARBgNVBAgMCkNhbGlmb3JuaWExFjAUBgNVBAcMDU1vdW50YWluIFZpZXcxEzARBgNVBAoMCkdvb2dsZSBMTEMxFTATBgNVBAMMDCouZ29vZ2xlLmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABMRScn8kk6qy3LHVktWZWxm%2FMq4kowlEdxQH40wijThZ%2B%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%2B6qCqNh1Xza9Wlm%2FGDVb%2BKp0PHUZaNDMThFQQqGn2XVi7ZkhqsxTtMw88Nrl97Bi1OsnNPlabhDwxtRyWkNkLdpFxebRz73CsjyoB3cboH%2FZ8sU9LLwXe%2FIJgMkvT7fznKtKSweWV%2BmAYG%2F3KzaIyLrowYpyOsWaYytPJK7ypuk6yOPxuQcQnelotWpuHUBR3mo3FIW56BPCy20KwqwvWoZe27BNxO%2F11Ym%2FPnric2fWXwgmHdkvVqqssUMFs%2BmG2tS%2FpqnR5yZdQL60xOgDq70mVWYgQT4yUTm7i8qvugvNnuSIjjsbelHgbC8f5%2Fx%2Bo2pEyw%2FDYyKw%3D&cert=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%2Bnqm1FCdfZgKO3u4CAbd5Oc2EaZB5KjhOcEo6GjhGKcLS430y%2FXhqWo6dDWWYal1Ulu7CCvNLir0Q5aQ2m8EJuafK%2BqwxSBCGXiWeT4HXqabyU34i70bQbgBSjvffaHr27HVrD4hxq0DspKTIpf0fc4%2B%2Fs%2FTTbxEmX7FbVgmu3Y3rTpeNXegL2Lp5nrGp1drWpcM6g8PlrlhcWujdD2Sb0BpIO0dFNCmvOwDspKt8Ih7t0Sw3Q7u0EGEGJLt%2BgY7nrBoRm1G0DSBd0Ih4coHzfgoGBPy11atynvLwIDAQABo4IC%2FDCCAvgwHwYDVR0jBBgwFoAUUWj%2FkK8CB3U8zNllZGKiErhZcjswHQYDVR0OBBYEFNFZBVr1ptzC%2FiUkvSIQ8QAGfB5jMCUGA1UdEQQeMByCDSoudHdpdHRlci5jb22CC3R3aXR0ZXIuY29tMA4GA1UdDwEB%2FwQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwdQYDVR0fBG4wbDA0oDKgMIYuaHR0cDovL2NybDMuZGlnaWNlcnQuY29tL3NoYTItaGEtc2VydmVyLWc2LmNybDA0oDKgMIYuaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NoYTItaGEtc2VydmVyLWc2LmNybDBMBgNVHSAERTBDMDcGCWCGSAGG%2FWwBATAqMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy5kaWdpY2VydC5jb20vQ1BTMAgGBmeBDAECAjCBgwYIKwYBBQUHAQEEdzB1MCQGCCsGAQUFBzABhhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wTQYIKwYBBQUHMAKGQWh0dHA6Ly9jYWNlcnRzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydFNIQTJIaWdoQXNzdXJhbmNlU2VydmVyQ0EuY3J0MAwGA1UdEwEB%2FwQCMAAwggEFBgorBgEEAdZ5AgQCBIH2BIHzAPEAdgDuS723dc5guuFCaR%2Br4Z5mow9%2BX7By2IMAxHuJeqj9ywAAAWrrCDXmAAAEAwBHMEUCIQCSwzRMoifj1DjYLJuMOH%2BZ6coX83bWIgWgWynLUED87wIgFKdipP9ycAE8S9apXJxKQyp0RoA%2Ftca5%2BWHQE5VlF68AdwCHdb%2FnWXz4jEOZX73zbv9WjUdWNv9KtWDBtOr%2FXqCDDwAAAWrrCDakAAAEAwBIMEYCIQCcmFOfp58BDMFZZS%2FRVl2uiY94RcTozBrcmtkpoWhgkgIhAN%2BX3ODViV4HnN2ZpZ383mFaEHIjKACRdWTRL%2BcYA43lMA0GCSqGSIb3DQEBCwUAA4IBAQB8LQLmUzevGtdw%2FXVL8aFrotloF3zsUPb2Q7CONLzlMGrmfv%2BNKDXN9xqPLLzmX4MddOjfpbVcDX1mJkuvuYNhh5AQrsaxcfEgfMcqPOdELA1mHPfk8H5a8Tvno1nF9wQWqkCQjLedjKReivmDOGfs1%2Fl%2FDnrprc0v4f28cWvN7YkJsdqfEGLbJ6SKsAxNbtNn%2Ffi6LxnemjLbcTrZYps11Ex55PtDNc200ejqpbpzHolgAew4KUzsyElaYSvDwkLMdmfwYSI9wgcPmrPBfZ0N12TAfmJJbE%2FkZc0jIOi92A%2FVgZLKvQrxadnBqPzAR%2F2SrZMT5joWa5sHpwl9fg5Z";
+
+// both invalids
+const errorCerts1 = "about:certificate?cert=aa&cert=bb&cert=abc";
+// one invalid and other valid
+const errorCerts2 =
+  "about:certificate?cert=aa&cert=MIIGRjCCBS6gAwIBAgIQDJduPkI49CDWPd%2BG7%2Bu6kDANBgkqhkiG9w0BAQsFADBNMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMScwJQYDVQQDEx5EaWdpQ2VydCBTSEEyIFNlY3VyZSBTZXJ2ZXIgQ0EwHhcNMTgxMTA1MDAwMDAwWhcNMTkxMTEzMTIwMDAwWjCBgzELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDU1vdW50YWluIFZpZXcxHDAaBgNVBAoTE01vemlsbGEgQ29ycG9yYXRpb24xDzANBgNVBAsTBldlYk9wczEYMBYGA1UEAxMPd3d3Lm1vemlsbGEub3JnMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuKruymkkmkqCJh7QjmXlUOBcLFRyw5LG%2FvUUWVrsxC2gsbR8WJq%2BcYoYBpoNVStKrO4U2rBh1GEbccvT6qKOQI%2BpjjDxx9cmRdubGTGp8L0MF1ohVvhIvYLumOEoRDDPU4PvGJjGhek%2FojvedPWe8dhciHkxOC2qPFZvVFMwg1%2Fo%2Fb80147BwZQmzB18mnHsmcyKlpsCN8pxw86uao9Iun8gZQrsllW64rTZlRR56pHdAcuGAoZjYZxwS9Z%2BlvrSjEgrddemWyGGalqyFp1rXlVM1Tf4%2FIYWAQXTgTUN303u3xMjss7QK7eUDsACRxiWPLW9XQDd1c%2ByvaYJKzgJ2wIDAQABo4IC6TCCAuUwHwYDVR0jBBgwFoAUD4BhHIIxYdUvKOeNRji0LOHG2eIwHQYDVR0OBBYEFNpSvSGcN2VT%2FB9TdQ8eXwebo60%2FMCcGA1UdEQQgMB6CD3d3dy5tb3ppbGxhLm9yZ4ILbW96aWxsYS5vcmcwDgYDVR0PAQH%2FBAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjBrBgNVHR8EZDBiMC%2BgLaArhilodHRwOi8vY3JsMy5kaWdpY2VydC5jb20vc3NjYS1zaGEyLWc2LmNybDAvoC2gK4YpaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NzY2Etc2hhMi1nNi5jcmwwTAYDVR0gBEUwQzA3BglghkgBhv1sAQEwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cuZGlnaWNlcnQuY29tL0NQUzAIBgZngQwBAgIwfAYIKwYBBQUHAQEEcDBuMCQGCCsGAQUFBzABhhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wRgYIKwYBBQUHMAKGOmh0dHA6Ly9jYWNlcnRzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydFNIQTJTZWN1cmVTZXJ2ZXJDQS5jcnQwDAYDVR0TAQH%2FBAIwADCCAQIGCisGAQQB1nkCBAIEgfMEgfAA7gB1AKS5CZC0GFgUh7sTosxncAo8NZgE%2BRvfuON3zQ7IDdwQAAABZuYWiHwAAAQDAEYwRAIgZnMSH1JdG6NASHWTwD0mlP%2Fzbr0hzP263c02Ym0DU64CIEe4QHJDP47j0b6oTFu6RrZz1NQ9cq8Az1KnMKRuaFAlAHUAh3W%2F51l8%2BIxDmV%2B9827%2FVo1HVjb%2FSrVgwbTq%2F16ggw8AAAFm5haJAgAABAMARjBEAiAxGLXkUaOAkZhXNeNR3pWyahZeKmSaMXadgu18SfK1ZAIgKtwu5eGxK76rgaszLCZ9edBIjuU0DKorzPUuxUXFY0QwDQYJKoZIhvcNAQELBQADggEBAKLJAFO3wuaP5MM%2Fed1lhk5Uc2aDokhcM7XyvdhEKSHbgPhcgMoT9YIVoPa70gNC6KHcwoXu0g8wt7X6Vm1ql%2F68G5q844kFuC6JPl4LVT9mciD%2BVW6bHUSXD9xifL9DqdJ0Ic0SllTlM%2Boq5aAeOxUQGXhXIqj6fSQv9fQN6mXxQIoc%2Fgjxteskq%2FVl8YmY1FIZP9Bh7g27kxZ9GAAGQtjTL03RzKAuSg6yeImYVdQWasc7UPnBXlRAzZ8%2BOJThUbzK16a2CI3Rg4agKSJk%2BuA47h1%2FImmngpFLRb%2FMvRX6H1oWcUuyH6O7PZdl0YpwTpw1THIuqCGl%2FwpPgyQgcTM%3D";
+
+async function checkSubjectName(inputPage, subjectsNameInfo) {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: inputPage,
+    },
+    async function (browser) {
+      await SpecialPowers.spawn(
+        browser,
+        [subjectsNameInfo],
+        async function (subjectsNameInfoExpected) {
+          let certificateSection = await ContentTaskUtils.waitForCondition(
+            () => {
+              return content.document.querySelector("certificate-section");
+            },
+            "Certificate section found"
+          );
+
+          async function selectTab(tabName, index) {
+            let tabs =
+              certificateSection.shadowRoot.querySelector(".certificate-tabs");
+
+            let tab = tabs.querySelector(`.tab[idnumber="${index}"]`);
+            Assert.ok(tab, `Tab at index ${index} found`);
+            Assert.equal(
+              tab.innerText,
+              tabName,
+              `Tab name should be ${tabName}`
+            );
+
+            tab.click();
+          }
+
+          function checkSelectedTab(sectionItemsExpected, index) {
+            let infoGroup = certificateSection.shadowRoot.querySelector(
+              `#panel${index} info-group`
+            );
+            Assert.ok(infoGroup, "infoGroup found");
+
+            let sectionTitle =
+              infoGroup.shadowRoot.querySelector(".info-group-title").innerText;
+            Assert.equal(
+              sectionTitle,
+              "Subject Name",
+              "Subject Name must be the selected item"
+            );
+
+            let infoItems = infoGroup.shadowRoot.querySelectorAll("info-item");
+            Assert.equal(
+              infoItems.length,
+              sectionItemsExpected.length,
+              "sectionItems must be the same length"
+            );
+          }
+
+          for (let i = 0; i < subjectsNameInfoExpected.length; i++) {
+            await selectTab(subjectsNameInfoExpected[i].tabName, i);
+            checkSelectedTab(subjectsNameInfoExpected[i].sectionItems, i);
+          }
+        }
+      );
+    }
+  );
+}
+
+async function checkTabsName(inputPage, tabsNames) {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: inputPage,
+    },
+    async function (browser) {
+      await SpecialPowers.spawn(
+        browser,
+        [tabsNames],
+        async function (expectedTabsNames) {
+          let certificateSection = await ContentTaskUtils.waitForCondition(
+            () => {
+              return content.document.querySelector("certificate-section");
+            },
+            "Certificate section found"
+          );
+
+          let tabsSection =
+            certificateSection.shadowRoot.querySelector(".certificate-tabs");
+          Assert.ok(tabsSection, "Tabs section found");
+
+          let tabs = tabsSection.children;
+          Assert.equal(
+            tabs.length,
+            expectedTabsNames.length,
+            `There must be ${expectedTabsNames.length} tabs`
+          );
+
+          for (let i = 0; i < expectedTabsNames.length; i++) {
+            Assert.equal(
+              tabs[i].innerText,
+              expectedTabsNames[i],
+              "Tab name must be equal to expected tab name"
+            );
+            if (i === 0) {
+              Assert.ok(
+                tabs[i].className.includes("selected"),
+                "First tab must be selected"
+              );
+            } else {
+              Assert.equal(
+                tabs[i].className.includes("selected"),
+                false,
+                "Just the first tab must be selected"
+              );
+            }
+          }
+        }
+      );
+    }
+  );
+}
+
+async function checkDOM(inputPage, errorExpected) {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: inputPage,
+    },
+    async function (browser) {
+      await SpecialPowers.spawn(
+        browser,
+        [errorExpected],
+        async function (errorExpected) {
+          let certificateSection = await ContentTaskUtils.waitForCondition(
+            () => {
+              return content.document.querySelector("certificate-section");
+            },
+            "Certificate section found"
+          );
+
+          let errorSection =
+            certificateSection.shadowRoot.querySelector("error-section");
+
+          if (errorExpected) {
+            // should render error page
+            Assert.ok(errorSection, "Error section found");
+          } else {
+            // should render page with certificate info
+            Assert.equal(errorSection, null, "Error section was not found");
+          }
+        }
+      );
+    }
+  );
+}
+
+add_task(async function runTests() {
+  let inputs = [
+    {
+      url: multipleCerts1,
+      tabsNames: ["www.mozilla.org", "github.com"],
+      errorPageExpected: false,
+      subjectNameInfo: [
+        {
+          tabName: "www.mozilla.org",
+          sectionTitle: "Subject Name",
+          sectionItems: [
+            { label: "Country", info: "US" },
+            { label: "State / Province", info: "California" },
+            { label: "Locality", info: "Mountain View" },
+            { label: "Organization", info: "Mozilla Corporation" },
+            { label: "Organizational Unit", info: "WebOps" },
+            { label: "Common Name", info: "www.mozilla.org" },
+          ],
+        },
+        {
+          tabName: "github.com",
+          sectionTitle: "Subject Name",
+          sectionItems: [
+            { label: "Business Category", info: "Private Organization" },
+            { label: "Inc. Country", info: "US" },
+            { label: "Inc. State / Province", info: "Delaware" },
+            { label: "Serial Number", info: "5157550" },
+            { label: "Country", info: "US" },
+            { label: "State / Province", info: "California" },
+            { label: "Locality", info: "San Francisco" },
+            { label: "Organization", info: "GitHub, Inc." },
+            { label: "Common Name", info: "github.com" },
+          ],
+        },
+      ],
+    },
+    {
+      url: multipleCerts2,
+      tabsNames: ["*.google.com", "*.twitter.com"],
+      errorPageExpected: false,
+      subjectNameInfo: [
+        {
+          tabName: "*.google.com",
+          sectionTitle: "Subject Name",
+          sectionItems: [
+            { label: "Country", info: "US" },
+            { label: "State / Province", info: "California" },
+            { label: "Locality", info: "Mountain View" },
+            { label: "Organization", info: "Google LLC" },
+            { label: "Common Name", info: "*.google.com" },
+          ],
+        },
+        {
+          tabName: "*.twitter.com",
+          sectionTitle: "Subject Name",
+          sectionItems: [
+            { label: "Country", info: "US" },
+            { label: "State / Province", info: "California" },
+            { label: "Locality", info: "San Francisco" },
+            { label: "Organization", info: "Twitter, Inc." },
+            { label: "Organizational Unit", info: "atla" },
+            { label: "Common Name", info: "*.twitter.com" },
+          ],
+        },
+      ],
+    },
+    {
+      url: errorCerts1,
+      tabsNames: [],
+      errorPageExpected: true,
+    },
+    {
+      url: errorCerts2,
+      tabsNames: [],
+      errorPageExpected: true,
+    },
+  ];
+
+  for (let input of inputs) {
+    await checkDOM(input.url, input.errorPageExpected);
+    if (!input.errorPageExpected) {
+      await checkTabsName(input.url, input.tabsNames);
+      await checkSubjectName(input.url, input.subjectNameInfo);
+    }
+  }
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_openTabAndSendCertInfo.js b/toolkit/components/certviewer/tests/browser/browser_openTabAndSendCertInfo.js
new file mode 100644
index 0000000000..c6307f529a
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_openTabAndSendCertInfo.js
@@ -0,0 +1,271 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_CERT_BASE64 =
+  "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";
+
+function checkSpec(spec) {
+  Assert.ok(
+    spec.startsWith("about:certificate"),
+    "about:certificate was opened"
+  );
+
+  let newUrl = new URL(spec);
+  let certEncoded = newUrl.searchParams.get("cert");
+  let certDecoded = decodeURIComponent(certEncoded);
+  Assert.equal(
+    btoa(atob(certDecoded)),
+    certDecoded,
+    "We received an base64 string"
+  );
+}
+
+function checksCertTab(tabsCount) {
+  Assert.equal(gBrowser.tabs.length, tabsCount + 1, "New tab was opened");
+  let spec = gBrowser.tabs[tabsCount].linkedBrowser.documentURI.spec;
+  checkSpec(spec);
+}
+
+async function checkCertChain(browser) {
+  await SpecialPowers.spawn(browser, [], async function () {
+    let certificateTabs;
+    await ContentTaskUtils.waitForCondition(() => {
+      let certificateSection = content.document.querySelector(
+        "certificate-section"
+      );
+      if (!certificateSection) {
+        return false;
+      }
+      certificateTabs =
+        certificateSection.shadowRoot.querySelectorAll(".certificate-tab");
+      return certificateTabs.length;
+    }, "Found certificate tabs.");
+
+    Assert.greaterOrEqual(
+      certificateTabs.length,
+      1,
+      "Certificate chain tabs shown"
+    );
+  });
+}
+
+// taken from https://searchfox.org/mozilla-central/rev/7ed8e2d3d1d7a1464ba42763a33fd2e60efcaedc/security/manager/ssl/tests/mochitest/browser/browser_downloadCert_ui.js#47
+function openCertDownloadDialog(cert) {
+  let returnVals = Cc["@mozilla.org/hash-property-bag;1"].createInstance(
+    Ci.nsIWritablePropertyBag2
+  );
+  let win = window.openDialog(
+    "chrome://pippki/content/downloadcert.xhtml",
+    "",
+    "",
+    cert,
+    returnVals
+  );
+  return new Promise((resolve, reject) => {
+    win.addEventListener(
+      "load",
+      function () {
+        executeSoon(() => resolve([win]));
+      },
+      { once: true }
+    );
+  });
+}
+
+add_task(async function openFromPopUp() {
+  info("Testing openFromPopUp");
+
+  const certdb = Cc["@mozilla.org/security/x509certdb;1"].getService(
+    Ci.nsIX509CertDB
+  );
+  let cert = certdb.constructX509FromBase64(TEST_CERT_BASE64);
+
+  let [win] = await openCertDownloadDialog(cert);
+  let viewCertButton = win.document.getElementById("viewC-button");
+  let newWinOpened = BrowserTestUtils.waitForNewWindow();
+  viewCertButton.click();
+
+  let topWin = await newWinOpened;
+  let browser = topWin.gBrowser.selectedBrowser;
+
+  // We're racing against messages sent up from the content process that
+  // loads about:certificate. It may or may not have had the opportunity
+  // to tell the parent that it had loaded the page yet. If not, we wait
+  // for the page to load.
+  //
+  // Note that we can't use the URL parameter for
+  // BrowserTestUtils.waitForNewWindow, since we need to use a function
+  // to choose the right URL.
+  if (!browser.currentURI.spec.startsWith("about:certificate")) {
+    await BrowserTestUtils.browserLoaded(browser, false, spec =>
+      spec.startsWith("about:certificate")
+    );
+  }
+
+  let spec = browser.currentURI.spec;
+  checkSpec(spec);
+
+  await checkCertChain(browser);
+
+  await BrowserTestUtils.closeWindow(topWin); // closes about:certificate
+  win.document.getElementById("download_cert").cancelDialog();
+  await BrowserTestUtils.windowClosed(win);
+});
+
+add_task(async function testBadCert() {
+  info("Testing bad cert");
+
+  let tab = await openErrorPage();
+
+  let tabsCount = gBrowser.tabs.length;
+  let loaded = BrowserTestUtils.waitForNewTab(gBrowser, null, true);
+
+  await SpecialPowers.spawn(tab.linkedBrowser, [], async function () {
+    let advancedButton = content.document.getElementById("advancedButton");
+    Assert.ok(advancedButton, "advancedButton found");
+    Assert.equal(
+      advancedButton.hasAttribute("disabled"),
+      false,
+      "advancedButton should be clickable"
+    );
+    advancedButton.click();
+    let viewCertificate = content.document.getElementById("viewCertificate");
+    Assert.ok(viewCertificate, "viewCertificate found");
+    Assert.equal(
+      viewCertificate.hasAttribute("disabled"),
+      false,
+      "viewCertificate should be clickable"
+    );
+
+    viewCertificate.click();
+  });
+  await loaded;
+  checksCertTab(tabsCount);
+  await checkCertChain(gBrowser.selectedBrowser);
+
+  gBrowser.removeCurrentTab(); // closes about:certificate
+  gBrowser.removeCurrentTab(); // closes https://expired.example.com/
+});
+
+add_task(async function testBadCertIframe() {
+  info("Testing bad cert in an iframe");
+
+  let tab = await openErrorPage(true);
+
+  let tabsCount = gBrowser.tabs.length;
+  let loaded = BrowserTestUtils.waitForNewTab(gBrowser, null, true);
+
+  await SpecialPowers.spawn(tab.linkedBrowser, [], async function () {
+    let doc = content.document.querySelector("iframe").contentDocument;
+    let advancedButton = doc.getElementById("advancedButton");
+    Assert.ok(advancedButton, "advancedButton found");
+    Assert.equal(
+      advancedButton.hasAttribute("disabled"),
+      false,
+      "advancedButton should be clickable"
+    );
+    advancedButton.click();
+    let viewCertificate = doc.getElementById("viewCertificate");
+    Assert.ok(viewCertificate, "viewCertificate found");
+    Assert.equal(
+      viewCertificate.hasAttribute("disabled"),
+      false,
+      "viewCertificate should be clickable"
+    );
+
+    viewCertificate.click();
+  });
+  await loaded;
+  checksCertTab(tabsCount);
+  await checkCertChain(gBrowser.selectedBrowser);
+
+  gBrowser.removeCurrentTab(); // closes about:certificate
+  gBrowser.removeCurrentTab(); // closes https://expired.example.com/
+});
+
+add_task(async function testGoodCert() {
+  info("Testing page info");
+  let url = "https://example.com/";
+
+  let tabsCount = gBrowser.tabs.length;
+
+  info(`Loading ${url}`);
+  await BrowserTestUtils.withNewTab({ gBrowser, url }, async function () {
+    info("Opening pageinfo");
+    let pageInfo = BrowserPageInfo(url, "securityTab", {});
+    await BrowserTestUtils.waitForEvent(pageInfo, "load");
+
+    let securityTab = pageInfo.document.getElementById("securityTab");
+    await TestUtils.waitForCondition(
+      () => BrowserTestUtils.isVisible(securityTab),
+      "Security tab should be visible."
+    );
+    Assert.ok(securityTab, "Security tab is available");
+    let viewCertButton = pageInfo.document.getElementById("security-view-cert");
+    await TestUtils.waitForCondition(
+      () => BrowserTestUtils.isVisible(viewCertButton),
+      "view cert button should be visible."
+    );
+
+    let loaded = BrowserTestUtils.waitForNewTab(gBrowser, null, true);
+    checkAndClickButton(pageInfo.document, "security-view-cert");
+    await loaded;
+
+    await checkCertChain(gBrowser.selectedBrowser);
+    pageInfo.close();
+  });
+  checksCertTab(tabsCount);
+
+  gBrowser.removeCurrentTab(); // closes about:certificate
+});
+
+add_task(async function testPreferencesCert() {
+  info("Testing preferences cert");
+  let url = "about:preferences#privacy";
+
+  let tabsCount;
+
+  info(`Loading ${url}`);
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url },
+    async function (browser) {
+      tabsCount = gBrowser.tabs.length;
+      checkAndClickButton(browser.contentDocument, "viewCertificatesButton");
+
+      let certDialogLoaded = promiseLoadSubDialog(
+        "chrome://pippki/content/certManager.xhtml"
+      );
+      let dialogWin = await certDialogLoaded;
+      let doc = dialogWin.document;
+      Assert.ok(doc, "doc loaded");
+
+      doc.getElementById("certmanagertabs").selectedTab =
+        doc.getElementById("mine_tab");
+      let treeView = doc.getElementById("user-tree").view;
+      let selectedCert;
+      // See https://searchfox.org/mozilla-central/rev/40ef22080910c2e2c27d9e2120642376b1d8b8b2/browser/components/preferences/in-content/tests/browser_cert_export.js#41
+      for (let i = 0; i < treeView.rowCount; i++) {
+        treeView.selection.select(i);
+        dialogWin.getSelectedCerts();
+        let certs = dialogWin.selected_certs;
+        if (certs && certs[0]) {
+          selectedCert = certs[0];
+          break;
+        }
+      }
+      Assert.ok(selectedCert, "A cert should be selected");
+      let viewButton = doc.getElementById("mine_viewButton");
+      Assert.equal(viewButton.disabled, false, "Should enable view button");
+
+      let loaded = BrowserTestUtils.waitForNewTab(gBrowser, null, true);
+      viewButton.click();
+      await loaded;
+
+      checksCertTab(tabsCount);
+      await checkCertChain(gBrowser.selectedBrowser);
+    }
+  );
+  gBrowser.removeCurrentTab(); // closes about:certificate
+});
diff --git a/toolkit/components/certviewer/tests/browser/browser_renderCertToUI.js b/toolkit/components/certviewer/tests/browser/browser_renderCertToUI.js
new file mode 100644
index 0000000000..0ecb93f176
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/browser_renderCertToUI.js
@@ -0,0 +1,192 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const url =
+  "about:certificate?cert=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%2FXqYQkzFMBlXmqkzC%2BFdTRBYyneZw5Pz%2BXWQvL%2B74JW6LsWNc2EF0xCEqLOJuC9zjPAqbr7uroNLghGxYf13YdqbG5oj%2F4x%2BogEG3dF%2FU5YIwVr658DKyESMV6eoYV9mDVfTuJastkqcwero%2B5ZAKfYVMLUEsMwFtoTDJFmVf6JlkOWwsxp1WcQ%2FMRQK1cyqOoUFUgYylgdh3yeCDPeF22Ax8AlQxbcaI%2BGwfQL1FB7Jy%2Bh%2BKjME9lE%2FUpgV6Qt2R1xNSmvFCBWu%2BNFX6epwFP%2FJRbkMfLz0beYFUvmMgLtwVpEPSwIDAQABo4IDeTCCA3UwHwYDVR0jBBgwFoAUPdNQpdagre7zSmAKZdMh1Pj41g8wHQYDVR0OBBYEFMnCU2FmnV%2BrJfQmzQ84mqhJ6kipMCUGA1UdEQQeMByCCmdpdGh1Yi5jb22CDnd3dy5naXRodWIuY29tMA4GA1UdDwEB%2FwQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwdQYDVR0fBG4wbDA0oDKgMIYuaHR0cDovL2NybDMuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDA0oDKgMIYuaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL3NoYTItZXYtc2VydmVyLWcyLmNybDBLBgNVHSAERDBCMDcGCWCGSAGG%2FWwCATAqMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy5kaWdpY2VydC5jb20vQ1BTMAcGBWeBDAEBMIGIBggrBgEFBQcBAQR8MHowJAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTBSBggrBgEFBQcwAoZGaHR0cDovL2NhY2VydHMuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0U0hBMkV4dGVuZGVkVmFsaWRhdGlvblNlcnZlckNBLmNydDAMBgNVHRMBAf8EAjAAMIIBfgYKKwYBBAHWeQIEAgSCAW4EggFqAWgAdgCkuQmQtBhYFIe7E6LMZ3AKPDWYBPkb37jjd80OyA3cEAAAAWNBYm0KAAAEAwBHMEUCIQDRZp38cTWsWH2GdBpe%2FuPTWnsu%2Fm4BEC2%2BdIcvSykZYgIgCP5gGv6yzaazxBK2NwGdmmyuEFNSg2pARbMJlUFgU5UAdgBWFAaaL9fC7NP14b1Esj7HRna5vJkRXMDvlJhV1onQ3QAAAWNBYm0tAAAEAwBHMEUCIQCi7omUvYLm0b2LobtEeRAYnlIo7n6JxbYdrtYdmPUWJQIgVgw1AZ51vK9ENinBg22FPxb82TvNDO05T17hxXRC2IYAdgC72d%2B8H4pxtZOUI5eqkntHOFeVCqtS6BqQlmQ2jh7RhQAAAWNBYm3fAAAEAwBHMEUCIQChzdTKUU2N%2BXcqcK0OJYrN8EYynloVxho4yPk6Dq3EPgIgdNH5u8rC3UcslQV4B9o0a0w204omDREGKTVuEpxGeOQwDQYJKoZIhvcNAQELBQADggEBAHAPWpanWOW%2Fip2oJ5grAH8mqQfaunuCVE%2Bvac%2B88lkDK%2FLVdFgl2B6kIHZiYClzKtfczG93hWvKbST4NRNHP9LiaQqdNC17e5vNHnXVUGw%2ByxyjMLGqkgepOnZ2Rb14kcTOGp4i5AuJuuaMwXmCo7jUwPwfLe1NUlVBKqg6LK0Hcq4K0sZnxE8HFxiZ92WpV2AVWjRMEc%2F2z2shNoDvxvFUYyY1Oe67xINkmyQKc%2BygSBZzyLnXSFVWmHr3u5dcaaQGGAR42v6Ydr4iL38Hd4dOiBma%2BFXsXBIqWUjbST4VXmdaol7uzFMojA4zkxQDZAvF5XgJlAFadfySna%2Fteik%3D";
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/toolkit/components/certviewer/tests/browser/adjustedCerts.js",
+  this
+);
+
+add_task(async function test() {
+  Assert.ok(adjustedCerts, "adjustedCerts found");
+
+  let tabName = adjustedCerts[0].tabName;
+  let certItems = adjustedCerts[0].certItems;
+
+  await BrowserTestUtils.withNewTab(url, async function (browser) {
+    await SpecialPowers.spawn(
+      browser,
+      [[certItems, tabName]],
+      async function ([adjustedCerts, expectedTabName]) {
+        let certificateSection = await ContentTaskUtils.waitForCondition(() => {
+          return content.document.querySelector("certificate-section");
+        }, "Certificate section found");
+
+        let infoGroups =
+          certificateSection.shadowRoot.querySelectorAll("info-group");
+        Assert.ok(infoGroups, "infoGroups found");
+        Assert.equal(
+          infoGroups.length,
+          adjustedCerts.length,
+          "infoGroups must have the same length of adjustedCerts"
+        );
+
+        let tabName =
+          certificateSection.shadowRoot.querySelector(
+            ".tab[idnumber='0']"
+          ).textContent;
+        Assert.equal(tabName, expectedTabName, "Tab name should be the same");
+
+        function getElementByAttribute(source, property, target) {
+          for (let elem of source) {
+            if (elem.hasOwnProperty(property) && elem[property] === target) {
+              return elem;
+            }
+          }
+          return null;
+        }
+
+        function checkBooleans(got, expected) {
+          info(
+            "If adjustedCertElments returned true, this value should be Yes, otherwise it should be No"
+          );
+          let gotBool;
+          if (got === "Yes") {
+            gotBool = true;
+          } else if (got === "No") {
+            gotBool = false;
+          } else {
+            gotBool = null;
+          }
+          Assert.equal(
+            gotBool,
+            expected,
+            `Expected ${expected}, got ${gotBool}`
+          );
+        }
+
+        for (let infoGroup of infoGroups) {
+          let sectionId = infoGroup.shadowRoot
+            .querySelector(".info-group-title")
+            .getAttribute("data-l10n-id")
+            .replace("certificate-viewer-", "");
+
+          let adjustedCertsElem = getElementByAttribute(
+            adjustedCerts,
+            "sectionId",
+            sectionId
+          );
+          Assert.ok(adjustedCertsElem, "The element exists in adjustedCerts");
+
+          let infoItems = infoGroup.shadowRoot.querySelectorAll("info-item");
+          Assert.equal(
+            infoItems.length,
+            adjustedCertsElem.sectionItems.length,
+            "sectionItems must be the same length"
+          );
+
+          let i = 0;
+          // Message ID mappings
+          let stringMapping = {
+            signaturealgorithm: "signature-algorithm",
+          };
+          for (let infoItem of infoItems) {
+            let infoItemLabel = infoItem.shadowRoot
+              .querySelector("label")
+              .getAttribute("data-l10n-id");
+            let infoElem = infoItem.shadowRoot.querySelector(".info");
+            let infoItemInfo = infoElem.textContent;
+            let adjustedCertsElemLabel =
+              adjustedCertsElem.sectionItems[i].labelId;
+            let adjustedCertsElemInfo = adjustedCertsElem.sectionItems[i].info;
+
+            if (adjustedCertsElemLabel == null) {
+              adjustedCertsElemLabel = "";
+            }
+            adjustedCertsElemLabel = adjustedCertsElemLabel
+              .replace(/\s+/g, "-")
+              .replace(/\./g, "")
+              .replace(/\//g, "")
+              .replace(/--/g, "-")
+              .toLowerCase();
+            adjustedCertsElemLabel =
+              stringMapping[adjustedCertsElemLabel] || adjustedCertsElemLabel;
+
+            if (adjustedCertsElemInfo == null) {
+              adjustedCertsElemInfo = "";
+            }
+            if (typeof adjustedCertsElemInfo === "boolean") {
+              checkBooleans(infoItemInfo, adjustedCertsElemInfo);
+              continue;
+            }
+
+            if (
+              adjustedCertsElemLabel === "timestamp" ||
+              adjustedCertsElemLabel === "not-after" ||
+              adjustedCertsElemLabel === "not-before"
+            ) {
+              Assert.equal(
+                infoElem.textContent,
+                adjustedCertsElemInfo.utc,
+                "Timestamps must be equal"
+              );
+              i++;
+              continue;
+            }
+            if (adjustedCertsElemLabel === "download") {
+              Assert.equal(infoElem.children.length, 2, "Should have 2 links.");
+              for (let kid of infoElem.children) {
+                Assert.equal(
+                  kid.localName,
+                  "a",
+                  "Should get a cert/chain link."
+                );
+                Assert.ok(
+                  kid.download.endsWith("pem"),
+                  "Link `download` attribute should point to pem file."
+                );
+                Assert.ok(
+                  kid.dataset.l10nId.includes("pem"),
+                  "Link should be labeled"
+                );
+                Assert.equal(
+                  kid.dataset.l10nId.includes("chain"),
+                  kid.download.includes("chain"),
+                  "Download label and filename should match"
+                );
+              }
+              // Remaining tests in browser_downloadLink.js
+
+              i++;
+              continue;
+            }
+
+            if (Array.isArray(adjustedCertsElemInfo)) {
+              // there is a case where we have a boolean
+              adjustedCertsElemInfo = adjustedCertsElemInfo
+                .toString()
+                .replace(/,/g, ", ");
+            }
+
+            Assert.ok(
+              infoItemLabel.includes(adjustedCertsElemLabel),
+              "data-l10n-id must contain the original label"
+            );
+
+            Assert.equal(
+              infoItemInfo,
+              adjustedCertsElemInfo,
+              "Info must be equal"
+            );
+
+            i++;
+          }
+        }
+      }
+    );
+  });
+});
diff --git a/toolkit/components/certviewer/tests/browser/dummy_page.html b/toolkit/components/certviewer/tests/browser/dummy_page.html
new file mode 100644
index 0000000000..1a87e28408
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/dummy_page.html
@@ -0,0 +1,9 @@
+<html>
+<head>
+<title>Dummy test page</title>
+<meta http-equiv="Content-Type" content="text/html;charset=utf-8"></meta>
+</head>
+<body>
+<p>Dummy test page</p>
+</body>
+</html>
diff --git a/toolkit/components/certviewer/tests/browser/head.js b/toolkit/components/certviewer/tests/browser/head.js
new file mode 100644
index 0000000000..2a28444f9b
--- /dev/null
+++ b/toolkit/components/certviewer/tests/browser/head.js
@@ -0,0 +1,124 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+function checkAndClickButton(document, id) {
+  let button = document.getElementById(id);
+  Assert.ok(button, `${id} button found`);
+  Assert.equal(
+    button.hasAttribute("disabled"),
+    false,
+    "button should be clickable"
+  );
+  button.click();
+}
+
+function is_element_visible(aElement, aMsg) {
+  isnot(aElement, null, "Element should not be null, when checking visibility");
+  Assert.ok(!BrowserTestUtils.isHidden(aElement), aMsg);
+}
+
+// Extracted from https://searchfox.org/mozilla-central/rev/40ef22080910c2e2c27d9e2120642376b1d8b8b2/browser/components/preferences/in-content/tests/head.js#41
+function promiseLoadSubDialog(aURL) {
+  return new Promise((resolve, reject) => {
+    content.gSubDialog._dialogStack.addEventListener(
+      "dialogopen",
+      function dialogopen(aEvent) {
+        if (
+          aEvent.detail.dialog._frame.contentWindow.location == "about:blank"
+        ) {
+          return;
+        }
+        content.gSubDialog._dialogStack.removeEventListener(
+          "dialogopen",
+          dialogopen
+        );
+
+        Assert.equal(
+          aEvent.detail.dialog._frame.contentWindow.location.toString(),
+          aURL,
+          "Check the proper URL is loaded"
+        );
+
+        // Check visibility
+        is_element_visible(aEvent.detail.dialog._overlay, "Overlay is visible");
+
+        // Check that stylesheets were injected
+        let expectedStyleSheetURLs =
+          aEvent.detail.dialog._injectedStyleSheets.slice(0);
+        for (let styleSheet of aEvent.detail.dialog._frame.contentDocument
+          .styleSheets) {
+          let i = expectedStyleSheetURLs.indexOf(styleSheet.href);
+          if (i >= 0) {
+            info("found " + styleSheet.href);
+            expectedStyleSheetURLs.splice(i, 1);
+          }
+        }
+        Assert.equal(
+          expectedStyleSheetURLs.length,
+          0,
+          "All expectedStyleSheetURLs should have been found"
+        );
+
+        // Wait for the next event tick to make sure the remaining part of the
+        // testcase runs after the dialog gets ready for input.
+        executeSoon(() => resolve(aEvent.detail.dialog._frame.contentWindow));
+      }
+    );
+  });
+}
+
+function injectErrorPageFrame(tab, src) {
+  return SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [{ frameSrc: src }],
+    async function ({ frameSrc }) {
+      let loaded = ContentTaskUtils.waitForEvent(
+        content.wrappedJSObject,
+        "DOMFrameContentLoaded"
+      );
+      let iframe = content.document.createElement("iframe");
+      iframe.src = frameSrc;
+      content.document.body.appendChild(iframe);
+      await loaded;
+      // We will have race conditions when accessing the frame content after setting a src,
+      // so we can't wait for AboutNetErrorLoad. Let's wait for the certerror class to
+      // appear instead (which should happen at the same time as AboutNetErrorLoad).
+      await ContentTaskUtils.waitForCondition(() =>
+        iframe.contentDocument.body.classList.contains("certerror")
+      );
+    }
+  );
+}
+
+async function openErrorPage(useFrame = false) {
+  let src = "https://expired.example.com/";
+  let dummyPage =
+    getRootDirectory(gTestPath).replace(
+      "chrome://mochitests/content",
+      "https://example.com"
+    ) + "dummy_page.html";
+
+  let tab;
+  if (useFrame) {
+    info("Loading cert error page in an iframe");
+    tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, dummyPage);
+    await injectErrorPageFrame(tab, src);
+  } else {
+    let certErrorLoaded;
+    tab = await BrowserTestUtils.openNewForegroundTab(
+      gBrowser,
+      () => {
+        gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser, src);
+        let browser = gBrowser.selectedBrowser;
+        certErrorLoaded = BrowserTestUtils.waitForErrorPage(browser);
+      },
+      false
+    );
+    info("Loading and waiting for the cert error");
+    await certErrorLoaded;
+  }
+
+  return tab;
+}