There is more than just about:config to get at internal settings.
There are all kinds of information and settings that can be accessed with about: commands entered into the address bar.
This is the list of them for Firefox, but they also seem to work with Pale Moon.
- about: -->The same page as "Help -> About" (except that, on some applications, Help → About is a much smaller popup).
about:about -->Lists all these about: URLs (Mozilla Suite/SeaMonkey or Firefox 4 and newer only).
about:accounts -->Firefox Sync account.
about:addons -->The "new" addons manager, in trunk builds dated 2010-05-11 or later.
about:app-manager -->App Manager, a tool to help users build and install web apps on compatible devices (i.e. Firefox OS).
about:buildconfig -->Reveals details about your Mozilla build options.
about:cache -->Displays cache statistics and disk cache directory location.
about:cache?device=memory -->Lists memory cache entries.
about:cache?device=disk -->Lists disk cache entries.
about:cache-entry -->Shows information about a cache entry. Used in about:cache links. Requires parameters.
about:compartments -->shows a list of live JavaScript compartments.
about:config -->GUI for modifying user preferences.
about:crashes -->List of Breakpad crash reports, with links and datestamps.
about:customizing -->Only available on Australis builds of Firefox, starts the Customize mode.
about:credits -->The list of contributors to the Mozilla projects.
about:downloads -->Your recent downloads.
about:home -->Firefox Start Page.
about:healthreport -->Health Report. Also accessible via "Help -> Firefox Health Report".
about:licence and about:license -->both show the Mozilla Public License and the Netscape Public License for the piece of software.
about:logo -->Displays the application logo.
about:memory -->shows the memory usage of Firefox.
about:mozilla -->shows Book of Mozilla
about:networking -->Displays the experimental page about network connections in Firefox.
about:newtab -->the default new tab page.
about:permissions -->shows and manages the permissions as also shown in Tools → Page Info → Permissions.
about:plugins -->Lists all your plugins as well as other useful information.
about:preferences -->Open preferences.
about:privatebrowsing -->Open a new private window.
about:rights -->Displays the page "About Your Rights".
about:robots -->Easter egg.
about:sessionrestore -->Open the "Restore last browsing session" page.
about:support -->Displays information such as Application Basics (version, link to open the profile folder, link to about:plugins and about:buildconfig), Extensions, Modified Preferences and Graphics information. Also accessible via "Help -> Troubleshooting information".
about:sync-log -->Displays Sync logs.
about:sync-progress -->Displays synchronization progress.
about:telemetryThis -->page shows the information about performance, hardware, usage and customizations collected by Telemetry. This information is submitted to Mozilla to help improve Mozilla Firefox.
about:webrtc -->Will be implemented in near future.
about:welcomeback -->The "Firefox is ready to go" page.
about:about will give you a clickable list of all of them. Click on to go to that selected about: command.
