Add magical regex to catch browsers

apps/dav/lib/files/browsererrorpageplugin.php

@@ -57,7 +57,13 @@ class BrowserErrorPagePlugin extends ServerPlugin {
 		if ($request->getMethod() !== 'GET') {
 			return false;
 		}
-		return $request->isUserAgent([Request::USER_AGENT_IE_8]);
+		return $request->isUserAgent([
+			Request::USER_AGENT_IE,
+			Request::USER_AGENT_MS_EDGE,
+			Request::USER_AGENT_CHROME,
+			Request::USER_AGENT_FIREFOX,
+			Request::USER_AGENT_SAFARI,
+		]);
 	}
 
 	/**

lib/private/appframework/http/request.php

@@ -56,6 +56,14 @@ class Request implements \ArrayAccess, \Countable, IRequest {
 
 	const USER_AGENT_IE = '/(MSIE)|(Trident)/';
 	const USER_AGENT_IE_8 = '/MSIE 8.0/';
+	// Microsoft Edge User Agent from https://msdn.microsoft.com/en-us/library/hh869301(v=vs.85).aspx
+	const USER_AGENT_MS_EDGE = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\) Chrome\/[0-9.]+ (Mobile Safari|Safari)\/[0-9.]+ Edge\/[0-9.]+$/';
+	// Firefox User Agent from https://developer.mozilla.org/en-US/docs/Web/HTTP/Gecko_user_agent_string_reference
+	const USER_AGENT_FIREFOX = '/^Mozilla\/5\.0 \([^)]+\) Gecko\/[0-9.]+ Firefox\/[0-9.]+$/';
+	// Chrome User Agent from https://developer.chrome.com/multidevice/user-agent
+	const USER_AGENT_CHROME = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\) Chrome\/[0-9.]+ (Mobile Safari|Safari)\/[0-9.]+$/';
+	// Safari User Agent from http://www.useragentstring.com/pages/Safari/
+	const USER_AGENT_SAFARI = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\) Version\/[0-9.]+ Safari\/[0-9.A-Z]+$/';
 	// Android Chrome user agent: https://developers.google.com/chrome/mobile/docs/user-agent
 	const USER_AGENT_ANDROID_MOBILE_CHROME = '#Android.*Chrome/[.0-9]*#';
 	const USER_AGENT_FREEBOX = '#^Mozilla/5\.0$#';