• Enable automatic updates from GitHub

• Add temporary migration notifier for future updates from GitHub

• Enable automatic updates from GitHub

• Adapt toolbar icon for dark themes
• Fix some issues in Facebook chat
• Add preference for default method of changing PDF Viewer colors
• Add temporary migration routine for future updates from GitHub

[±] Fix misc compat issues with Pale Moon 28 (see #3)

[+] Add extra path to gDevTools.jsm for Pale Moon 28

[±] Set background-color of only for top-level windows, not iframes

[±] Preserve browser settings on disable night mode

[+] Allow to switch on/off dark DevTools theme
[±] Properly handle non-standard (like about:something) URLs with parameters

[±] Make PDF viewer interface color customizable
[±] Revert devtools theme back to 'light' when dark mode disabled