diff --git a/webextensions/api/devtools.json b/webextensions/api/devtools.json
index 5a7f1794ff4fac..ffc179c88a1648 100644
--- a/webextensions/api/devtools.json
+++ b/webextensions/api/devtools.json
@@ -6,7 +6,7 @@
           "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools",
           "support": {
             "chrome": {
-              "version_added": "≤58"
+              "version_added": "4"
             },
             "edge": "mirror",
             "firefox": {
@@ -31,7 +31,7 @@
             "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/inspectedWindow",
             "support": {
               "chrome": {
-                "version_added": "≤58"
+                "version_added": "18"
               },
               "edge": "mirror",
               "firefox": {
@@ -54,7 +54,7 @@
               "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/inspectedWindow/eval",
               "support": {
                 "chrome": {
-                  "version_added": "≤58"
+                  "version_added": "18"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -145,7 +145,7 @@
               "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/inspectedWindow/reload",
               "support": {
                 "chrome": {
-                  "version_added": "≤58"
+                  "version_added": "18"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -169,7 +169,7 @@
               "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/inspectedWindow/tabId",
               "support": {
                 "chrome": {
-                  "version_added": "≤58"
+                  "version_added": "18"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -194,7 +194,7 @@
             "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/network",
             "support": {
               "chrome": {
-                "version_added": "≤58"
+                "version_added": "18"
               },
               "edge": "mirror",
               "firefox": {
@@ -217,7 +217,7 @@
               "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/network/getHAR",
               "support": {
                 "chrome": {
-                  "version_added": "≤64"
+                  "version_added": "18"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -240,7 +240,7 @@
               "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/network/onNavigated",
               "support": {
                 "chrome": {
-                  "version_added": "≤58"
+                  "version_added": "18"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -264,7 +264,7 @@
               "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/network/onRequestFinished",
               "support": {
                 "chrome": {
-                  "version_added": "≤64"
+                  "version_added": "18"
                 },
                 "edge": "mirror",
                 "firefox": [
@@ -294,7 +294,7 @@
             "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels",
             "support": {
               "chrome": {
-                "version_added": "≤58"
+                "version_added": "18"
               },
               "edge": "mirror",
               "firefox": {
@@ -320,7 +320,7 @@
                 "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ElementsPanel/createSidebarPane",
                 "support": {
                   "chrome": {
-                    "version_added": "≤61"
+                    "version_added": "18"
                   },
                   "edge": "mirror",
                   "firefox": {
@@ -342,7 +342,7 @@
                 "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ElementsPanel/onSelectionChanged",
                 "support": {
                   "chrome": {
-                    "version_added": "≤61"
+                    "version_added": "18"
                   },
                   "edge": "mirror",
                   "firefox": {
@@ -365,7 +365,7 @@
               "__compat": {
                 "support": {
                   "chrome": {
-                    "version_added": "≤61"
+                    "version_added": "18"
                   },
                   "edge": "mirror",
                   "firefox": {
@@ -388,7 +388,7 @@
               "__compat": {
                 "support": {
                   "chrome": {
-                    "version_added": "≤59"
+                    "version_added": "18"
                   },
                   "edge": "mirror",
                   "firefox": {
@@ -407,7 +407,7 @@
               "__compat": {
                 "support": {
                   "chrome": {
-                    "version_added": "≤61"
+                    "version_added": "18"
                   },
                   "edge": "mirror",
                   "firefox": {
@@ -433,7 +433,7 @@
                 "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ExtensionSidebarPane/onHidden",
                 "support": {
                   "chrome": {
-                    "version_added": "≤61"
+                    "version_added": "18"
                   },
                   "edge": "mirror",
                   "firefox": {
@@ -456,7 +456,7 @@
                 "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ExtensionSidebarPane/onShown",
                 "support": {
                   "chrome": {
-                    "version_added": "≤61"
+                    "version_added": "18"
                   },
                   "edge": "mirror",
                   "firefox": {
@@ -479,7 +479,7 @@
                 "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ExtensionSidebarPane/setExpression",
                 "support": {
                   "chrome": {
-                    "version_added": "≤61",
+                    "version_added": "18",
                     "notes": "The expression must evaluate to a JavaScript object or a DOM node, or nothing is shown in the sidebar."
                   },
                   "edge": "mirror",
@@ -502,7 +502,7 @@
               "__compat": {
                 "support": {
                   "chrome": {
-                    "version_added": true
+                    "version_added": "18"
                   },
                   "edge": "mirror",
                   "firefox": {
@@ -522,7 +522,7 @@
                 "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ExtensionSidebarPane/setObject",
                 "support": {
                   "chrome": {
-                    "version_added": "≤61",
+                    "version_added": "18",
                     "notes": "If the `jsonObject` parameter is a string, it is not displayed."
                   },
                   "edge": "mirror",
@@ -546,7 +546,7 @@
                 "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ExtensionSidebarPane/setPage",
                 "support": {
                   "chrome": {
-                    "version_added": true
+                    "version_added": "18"
                   },
                   "edge": "mirror",
                   "firefox": {
@@ -569,7 +569,7 @@
               "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/create",
               "support": {
                 "chrome": {
-                  "version_added": "≤58"
+                  "version_added": "18"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -591,7 +591,7 @@
               "__compat": {
                 "support": {
                   "chrome": {
-                    "version_added": true,
+                    "version_added": "18",
                     "notes": "URL always resolved as absolute."
                   },
                   "edge": "mirror",
@@ -617,7 +617,7 @@
               "__compat": {
                 "support": {
                   "chrome": {
-                    "version_added": true,
+                    "version_added": "18",
                     "notes": "URL always resolved as absolute."
                   },
                   "edge": "mirror",
@@ -643,7 +643,7 @@
               "__compat": {
                 "support": {
                   "chrome": {
-                    "version_added": true
+                    "version_added": "18"
                   },
                   "edge": "mirror",
                   "firefox": {
@@ -668,7 +668,7 @@
               "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/elements",
               "support": {
                 "chrome": {
-                  "version_added": "≤61"
+                  "version_added": "18"
                 },
                 "edge": "mirror",
                 "firefox": {