Enable more about:debugging options by default (#232)

The `about:debugging` page [1] allows to debug processes, tabs and local
add-ons. These options are disabled by default and have now been enabled
in order to extend the ways to debug features.

[1]: https://developer.mozilla.org/en-US/docs/Tools/about:debugging

Closes GH-220

snowblocks/firefox/user.js

@@ -280,9 +280,15 @@ user_pref("datareporting.healthreport.uploadEnabled", false);
  * References:
  *   - https://developer.mozilla.org/son/docs/Tools
  */
+user_pref("devtools.aboutdebugging.collapsibilities.processes", true);
+user_pref("devtools.aboutdebugging.collapsibilities.tab", true);
+user_pref("devtools.aboutdebugging.local-tab-debugging", true);
+user_pref("devtools.aboutdebugging.showHiddenAddons", true);
 user_pref("devtools.cache.disabled", false);
 user_pref("devtools.command-button-frames.enabled", true);
 user_pref("devtools.command-button-measure.enabled", true);
+user_pref("devtools.command-button-noautohide.enabled", true);
+user_pref("devtools.command-button-paintflashing.enabled", true);
 user_pref("devtools.command-button-pick.enabled", true);
 user_pref("devtools.command-button-responsive.enabled", true);
 user_pref("devtools.command-button-rulers.enabled", true);