diff --git a/apps/files_external/css/settings.css b/apps/files_external/css/settings.css
index 9338b8d3ee..6dfb012b15 100644
--- a/apps/files_external/css/settings.css
+++ b/apps/files_external/css/settings.css
@@ -18,6 +18,11 @@ td.mountPoint, td.backend { width:160px; }
 #addMountPoint>td.applicable { visibility:hidden; }
 #addMountPoint>td.hidden { visibility:hidden; }
 
+#externalStorage .icon-settings {
+	padding: 11px 20px;
+	vertical-align: text-bottom;
+}
+
 #selectBackend {
 	margin-left: -10px;
 	width: 150px;
@@ -45,6 +50,10 @@ td.mountPoint, td.backend { width:160px; }
 	margin-right: 6px;
 }
 
+#externalStorage td.configuration input.disabled-success {
+	background-color: rgba(134, 255, 110, 0.9);
+}
+
 
 #externalStorage td.applicable div.chzn-container {
 	position: relative;
diff --git a/apps/files_external/js/dropbox.js b/apps/files_external/js/dropbox.js
new file mode 100644
index 0000000000..8302f5711d
--- /dev/null
+++ b/apps/files_external/js/dropbox.js
@@ -0,0 +1,30 @@
+$(document).ready(function() {
+
+	function generateUrl($tr) {
+		var app_key = $tr.find('[data-parameter="app_key"]').val();
+		if (app_key) {
+			return 'https://www.dropbox.com/developers/apps/info/' + app_key;
+		} else {
+			return 'https://www.dropbox.com/developers/apps';
+		}
+	}
+
+	OCA.External.Settings.mountConfig.whenSelectBackend(function($tr, backend, onCompletion) {
+		if (backend === 'dropbox') {
+			var backendEl = $tr.find('.backend');
+			var el = $(document.createElement('a'))
+				.attr('href', generateUrl($tr))
+				.attr('target', '_blank')
+				.attr('title', t('files_external', 'Dropbox App Configuration'))
+				.addClass('icon-settings svg')
+			;
+			el.on('click', function(event) {
+				var a = $(event.target);
+				a.attr('href', generateUrl($(this).closest('tr')));
+			});
+			el.tooltip({placement: 'top'});
+			backendEl.append(el);
+		}
+	});
+
+});
diff --git a/apps/files_external/js/gdrive.js b/apps/files_external/js/gdrive.js
new file mode 100644
index 0000000000..e02cedd6b4
--- /dev/null
+++ b/apps/files_external/js/gdrive.js
@@ -0,0 +1,26 @@
+$(document).ready(function() {
+
+	function generateUrl($tr) {
+		// no mapping between client ID and Google 'project', so we always load the same URL
+		return 'https://console.developers.google.com/';
+	}
+
+	OCA.External.Settings.mountConfig.whenSelectBackend(function($tr, backend, onCompletion) {
+		if (backend === 'googledrive') {
+			var backendEl = $tr.find('.backend');
+			var el = $(document.createElement('a'))
+				.attr('href', generateUrl($tr))
+				.attr('target', '_blank')
+				.attr('title', t('files_external', 'Google Drive App Configuration'))
+				.addClass('icon-settings svg')
+			;
+			el.on('click', function(event) {
+				var a = $(event.target);
+				a.attr('href', generateUrl($(this).closest('tr')));
+			});
+			el.tooltip({placement: 'top'});
+			backendEl.append(el);
+		}
+	});
+
+});
diff --git a/apps/files_external/js/oauth1.js b/apps/files_external/js/oauth1.js
index e2ba25ebf8..79248a3e3b 100644
--- a/apps/files_external/js/oauth1.js
+++ b/apps/files_external/js/oauth1.js
@@ -1,5 +1,9 @@
 $(document).ready(function() {
 
+	function displayGranted($tr) {
+		$tr.find('.configuration input.auth-param').attr('disabled', 'disabled').addClass('disabled-success');
+	}
+
 	OCA.External.Settings.mountConfig.whenSelectAuthMechanism(function($tr, authMechanism, scheme, onCompletion) {
 		if (authMechanism === 'oauth1::oauth1') {
 			var config = $tr.find('.configuration');
@@ -13,8 +17,7 @@ $(document).ready(function() {
 			onCompletion.then(function() {
 				var configured = $tr.find('[data-parameter="configured"]');
 				if ($(configured).val() == 'true') {
-					$tr.find('.configuration input').attr('disabled', 'disabled');
-					$tr.find('.configuration').append('<span id="access" style="padding-left:0.5em;">'+t('files_external', 'Access granted')+'</span>');
+					displayGranted($tr);
 				} else {
 					var app_key = $tr.find('.configuration [data-parameter="app_key"]').val();
 					var app_secret = $tr.find('.configuration [data-parameter="app_secret"]').val();
@@ -33,8 +36,7 @@ $(document).ready(function() {
 									$(configured).val('true');
 									OCA.External.Settings.mountConfig.saveStorageConfig($tr, function(status) {
 										if (status) {
-											$tr.find('.configuration input').attr('disabled', 'disabled');
-											$tr.find('.configuration').append('<span id="access" style="padding-left:0.5em;">'+t('files_external', 'Access granted')+'</span>');
+											displayGranted($tr);
 										}
 									});
 								} else {
diff --git a/apps/files_external/js/oauth2.js b/apps/files_external/js/oauth2.js
index 2556bf45ca..13b5162694 100644
--- a/apps/files_external/js/oauth2.js
+++ b/apps/files_external/js/oauth2.js
@@ -1,5 +1,9 @@
 $(document).ready(function() {
 
+	function displayGranted($tr) {
+		$tr.find('.configuration input.auth-param').attr('disabled', 'disabled').addClass('disabled-success');
+	}
+
 	OCA.External.Settings.mountConfig.whenSelectAuthMechanism(function($tr, authMechanism, scheme, onCompletion) {
 		if (authMechanism === 'oauth2::oauth2') {
 			var config = $tr.find('.configuration');
@@ -13,9 +17,7 @@ $(document).ready(function() {
 			onCompletion.then(function() {
 				var configured = $tr.find('[data-parameter="configured"]');
 				if ($(configured).val() == 'true') {
-					$tr.find('.configuration input').attr('disabled', 'disabled');
-					$tr.find('.configuration').append($('<span/>').attr('id', 'access')
-							.text(t('files_external', 'Access granted')));
+					displayGranted($tr);
 				} else {
 					var client_id = $tr.find('.configuration [data-parameter="client_id"]').val();
 					var client_secret = $tr.find('.configuration [data-parameter="client_secret"]')
@@ -43,10 +45,7 @@ $(document).ready(function() {
 											$(configured).val('true');
 											OCA.External.Settings.mountConfig.saveStorageConfig($tr, function(status) {
 												if (status) {
-													$tr.find('.configuration input').attr('disabled', 'disabled');
-													$tr.find('.configuration').append($('<span/>')
-															.attr('id', 'access')
-															.text(t('files_external', 'Access granted')));
+													displayGranted($tr);
 												}
 											});
 										} else {
diff --git a/apps/files_external/lib/auth/oauth1/oauth1.php b/apps/files_external/lib/auth/oauth1/oauth1.php
index dd83c9a6a6..808681530e 100644
--- a/apps/files_external/lib/auth/oauth1/oauth1.php
+++ b/apps/files_external/lib/auth/oauth1/oauth1.php
@@ -46,7 +46,7 @@ class OAuth1 extends AuthMechanism {
 				(new DefinitionParameter('token_secret', 'token_secret'))
 					->setType(DefinitionParameter::VALUE_HIDDEN),
 			])
-			->setCustomJs('oauth1')
+			->addCustomJs('oauth1')
 		;
 	}
 
diff --git a/apps/files_external/lib/auth/oauth2/oauth2.php b/apps/files_external/lib/auth/oauth2/oauth2.php
index c89007b52b..d4bba8ef0e 100644
--- a/apps/files_external/lib/auth/oauth2/oauth2.php
+++ b/apps/files_external/lib/auth/oauth2/oauth2.php
@@ -44,7 +44,7 @@ class OAuth2 extends AuthMechanism {
 				(new DefinitionParameter('token', 'token'))
 					->setType(DefinitionParameter::VALUE_HIDDEN),
 			])
-			->setCustomJs('oauth2')
+			->addCustomJs('oauth2')
 		;
 	}
 
diff --git a/apps/files_external/lib/auth/publickey/rsa.php b/apps/files_external/lib/auth/publickey/rsa.php
index 9045f6818f..7732beeddf 100644
--- a/apps/files_external/lib/auth/publickey/rsa.php
+++ b/apps/files_external/lib/auth/publickey/rsa.php
@@ -52,7 +52,7 @@ class RSA extends AuthMechanism {
 				(new DefinitionParameter('private_key', 'private_key'))
 					->setType(DefinitionParameter::VALUE_HIDDEN),
 			])
-			->setCustomJs('public_key')
+			->addCustomJs('public_key')
 		;
 	}
 
diff --git a/apps/files_external/lib/backend/dropbox.php b/apps/files_external/lib/backend/dropbox.php
index f915608251..2133c27499 100644
--- a/apps/files_external/lib/backend/dropbox.php
+++ b/apps/files_external/lib/backend/dropbox.php
@@ -44,6 +44,7 @@ class Dropbox extends Backend {
 				// all parameters handled in OAuth1 mechanism
 			])
 			->addAuthScheme(AuthMechanism::SCHEME_OAUTH1)
+			->addCustomJs('dropbox')
 			->setLegacyAuthMechanism($legacyAuth)
 		;
 	}
diff --git a/apps/files_external/lib/backend/google.php b/apps/files_external/lib/backend/google.php
index b2b48a0e40..b18b7bdb34 100644
--- a/apps/files_external/lib/backend/google.php
+++ b/apps/files_external/lib/backend/google.php
@@ -44,6 +44,7 @@ class Google extends Backend {
 				// all parameters handled in OAuth2 mechanism
 			])
 			->addAuthScheme(AuthMechanism::SCHEME_OAUTH2)
+			->addCustomJs('gdrive')
 			->setLegacyAuthMechanism($legacyAuth)
 		;
 	}
diff --git a/apps/files_external/lib/backend/legacybackend.php b/apps/files_external/lib/backend/legacybackend.php
index 084758ff78..752c501e1e 100644
--- a/apps/files_external/lib/backend/legacybackend.php
+++ b/apps/files_external/lib/backend/legacybackend.php
@@ -84,7 +84,7 @@ class LegacyBackend extends Backend {
 			$this->setPriority($definition['priority']);
 		}
 		if (isset($definition['custom'])) {
-			$this->setCustomJs($definition['custom']);
+			$this->addCustomJs($definition['custom']);
 		}
 		if (isset($definition['has_dependencies']) && $definition['has_dependencies']) {
 			$this->hasDependencies = true;
diff --git a/apps/files_external/lib/frontenddefinitiontrait.php b/apps/files_external/lib/frontenddefinitiontrait.php
index 9f2b7c40f7..ccc2a75fd1 100644
--- a/apps/files_external/lib/frontenddefinitiontrait.php
+++ b/apps/files_external/lib/frontenddefinitiontrait.php
@@ -36,8 +36,8 @@ trait FrontendDefinitionTrait {
 	/** @var DefinitionParameter[] parameters for mechanism */
 	private $parameters = [];
 
-	/** @var string|null custom JS */
-	private $customJs = null;
+	/** @var string[] custom JS */
+	private $customJs = [];
 
 	/**
 	 * @return string
@@ -92,7 +92,7 @@ trait FrontendDefinitionTrait {
 	}
 
 	/**
-	 * @return string|null
+	 * @return string[]
 	 */
 	public function getCustomJs() {
 		return $this->customJs;
@@ -102,8 +102,18 @@ trait FrontendDefinitionTrait {
 	 * @param string $custom
 	 * @return self
 	 */
+	public function addCustomJs($custom) {
+		$this->customJs[] = $custom;
+		return $this;
+	}
+
+	/**
+	 * @param string $custom
+	 * @return self
+	 * @deprecated 9.1.0, use addCustomJs() instead
+	 */
 	public function setCustomJs($custom) {
-		$this->customJs = $custom;
+		$this->customJs = [$custom];
 		return $this;
 	}
 
@@ -121,10 +131,8 @@ trait FrontendDefinitionTrait {
 		$data = [
 			'name' => $this->getText(),
 			'configuration' => $configuration,
+			'custom' => $this->getCustomJs(),
 		];
-		if (isset($this->customJs)) {
-			$data['custom'] = $this->getCustomJs();
-		}
 		return $data;
 	}
 
diff --git a/apps/files_external/templates/settings.php b/apps/files_external/templates/settings.php
index 7edd66fe4d..c9cc40b0ba 100644
--- a/apps/files_external/templates/settings.php
+++ b/apps/files_external/templates/settings.php
@@ -1,5 +1,6 @@
 <?php
 	use \OCA\Files_External\Lib\Backend\Backend;
+	use \OCA\Files_External\Lib\Auth\AuthMechanism;
 	use \OCA\Files_External\Lib\DefinitionParameter;
 	use \OCA\Files_External\Service\BackendService;
 
@@ -16,13 +17,16 @@
 	// load custom JS
 	foreach ($_['backends'] as $backend) {
 		/** @var Backend $backend */
-		if ($backend->getCustomJs()) {
-			script('files_external', $backend->getCustomJs());
+		$scripts = $backend->getCustomJs();
+		foreach ($scripts as $script) {
+			script('files_external', $script);
 		}
 	}
 	foreach ($_['authMechanisms'] as $authMechanism) {
-		if ($authMechanism->getCustomJs()) {
-			script('files_external', $authMechanism->getCustomJs());
+		/** @var AuthMechanism $authMechanism */
+		$scripts = $authMechanism->getCustomJs();
+		foreach ($scripts as $script) {
+			script('files_external', $script);
 		}
 	}
 
diff --git a/apps/files_external/tests/backend/legacybackendtest.php b/apps/files_external/tests/backend/legacybackendtest.php
index d825b7627b..465b79a6be 100644
--- a/apps/files_external/tests/backend/legacybackendtest.php
+++ b/apps/files_external/tests/backend/legacybackendtest.php
@@ -62,7 +62,7 @@ class LegacyBackendTest extends \Test\TestCase {
 		$this->assertEquals('\OCA\Files_External\Tests\Backend\LegacyBackendTest', $backend->getStorageClass());
 		$this->assertEquals('Backend text', $backend->getText());
 		$this->assertEquals(123, $backend->getPriority());
-		$this->assertEquals('foo/bar.js', $backend->getCustomJs());
+		$this->assertContains('foo/bar.js', $backend->getCustomJs());
 		$this->assertArrayHasKey('builtin', $backend->getAuthSchemes());
 		$this->assertEquals($auth, $backend->getLegacyAuthMechanism());
 
diff --git a/apps/files_external/tests/frontenddefinitiontraittest.php b/apps/files_external/tests/frontenddefinitiontraittest.php
index 2afc87762e..b3846fa151 100644
--- a/apps/files_external/tests/frontenddefinitiontraittest.php
+++ b/apps/files_external/tests/frontenddefinitiontraittest.php
@@ -33,12 +33,14 @@ class FrontendDefinitionTraitTest extends \Test\TestCase {
 		$trait = $this->getMockForTrait('\OCA\Files_External\Lib\FrontendDefinitionTrait');
 		$trait->setText('test');
 		$trait->addParameters([$param]);
-		$trait->setCustomJs('foo/bar.js');
+		$trait->addCustomJs('foo/bar.js');
+		$trait->addCustomJs('bar/foo.js');
 
 		$json = $trait->jsonSerializeDefinition();
 
 		$this->assertEquals('test', $json['name']);
-		$this->assertEquals('foo/bar.js', $json['custom']);
+		$this->assertContains('foo/bar.js', $json['custom']);
+		$this->assertContains('bar/foo.js', $json['custom']);
 
 		$configuration = $json['configuration'];
 		$this->assertArrayHasKey('foo', $configuration);