Bug 1609356 - Enable application panel in Nightly r=jdescottes

Differential Revision: https://phabricator.services.mozilla.com/D60143

--HG--
extra : moz-landing-system : lando

browser/app/profile/firefox.js

@@ -2078,8 +2078,12 @@ pref("devtools.netmonitor.enabled", true);
 pref("devtools.netmonitor.features.search", true);
 pref("devtools.netmonitor.features.requestBlocking", true);
 
-// Enable the Application panel
-pref("devtools.application.enabled", false);
+// Enable the Application panel on Nightly
+#if defined(NIGHTLY_BUILD)
+  pref("devtools.application.enabled", true);
+#else
+  pref("devtools.application.enabled", false);
+#endif
 
 // The default Network Monitor UI settings
 pref("devtools.netmonitor.panes-network-details-width", 550);

devtools/client/application/README.md

@@ -6,7 +6,7 @@ The Application panel is a Firefox Developer Tools panel meant to allow the insp
 
 ### How to enable the Application panel
 
-At the moment, the panel is hidden behind a configuration flag. In order to enable it, type `about:config` in the address bar, look for the `devtools.application.enabled` flag and set it to true. It will then appear as a tab with the rest of the panels within the Developer Tools toolbox.
+At the moment, the panel is shown by default on Nightly builds only, behind a configuration flag. In order to enable it, type `about:config` in the address bar, look for the `devtools.application.enabled` flag and set it to true. It will then appear as a tab with the rest of the panels within the Developer Tools toolbox.
 
 ## Technical overview
 

devtools/client/definitions.js

@@ -465,8 +465,8 @@ Tools.application = {
   label: l10n("application.label"),
   panelLabel: l10n("application.panellabel"),
   tooltip: l10n("application.tooltip"),
-  inMenu: false,
-  hiddenInOptions: true,
+  inMenu: AppConstants.NIGHTLY_BUILD,
+  hiddenInOptions: !AppConstants.NIGHTLY_BUILD,
 
   isTargetSupported: function(target) {
     return target.hasActor("manifest");