browser console

NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIProperties.get]  XULStore.js:64
1500416281217	addons.xpi	WARN	Failed to add directory install location app-system-defaults: Error: Location must be a directory. (resource://gre/modules/addons/XPIProvider.jsm:5838:13) JS Stack trace: DirectoryInstallLocation@XPIProvider.jsm:5838:13 < addDirectoryInstallLocation@XPIProvider.jsm:2096:34 < startup@XPIProvider.jsm:2175:7 < callProvider@AddonManager.jsm:271:12 < _startProvider@AddonManager.jsm:741:5 < startup@AddonManager.jsm:908:9 < startup@AddonManager.jsm:3122:5 < observe@addonManager.js:65:9
While creating services from category 'profile-after-change', service for entry 'Notification Telemetry Service', contract ID '@mozilla.org/notificationTelemetryService;1' does not implement nsIObserver.
To play video formats video/mp4, you need to install extra Microsoft software, see https://support.mozilla.org/kb/fix-video-audio-problems-firefox-windows  sanitytest.html
Win error 2 during operation open on file C:\Users\svuser\AppData\Local\Mozilla\Firefox\Profiles\wtjx0ntc.default\directoryLinks.json (The system cannot find the file specified.

)  DirectoryLinksProvider.jsm:254
Content Security Policy: Directive ‘frame-src’ has been deprecated. Please use directive ‘child-src’ instead.  (unknown)
Key event not available on some keyboard layouts: key=“r” modifiers=“accel,alt” id=“key_toggleReaderMode”  browser.xul
Key event not available on some keyboard layouts: key=“i” modifiers=“accel,alt,shift” id=“key_browserToolbox”  browser.xul