Windows Security Tutorials - Herong's Tutorial Examples - Version 3.00, by Dr. Herong Yang
Reviewing Advanced Settings in Firefox
This section provides a tutorial example on how to review advanced configuration settings in Firefox.
The last step to secure your Firefox is in the advanced configuration area.
1. Run Firefox and type in "about:config" in Web site address input box. You will see a warning message:
This might void your warranty! Changing these advanced settings can be harmful to the stability, security, and performance of this application. You only continue if you are sure of what you are doing.
2. Click the "I'll be careful, I promise!" button to continue. You will see all Firefox configuration settings in a single list.
3. Review each setting in the list. Watch out settings that Web addresses as their values.
For example, I have the following settings that use Web addresses:
app.support.baseURL: https://support.mozilla.org/1/firefox/... browser.dictionaries.download.url: https://addons.mozilla.org/... browser.safebrowsing.gethashURL: http://safebrowsing.clients.google... browser.search.defaultengine: Ask.com browser.search.defaulturl: http://search.yahoo.com/search?... browser.search.selectedEngine: Ask.com gecko.handlerService.schemes.irc.0.uriTemplate: https://www.mibbit... gecko.handlerService.schemes.webcal.0.uriTemplate: https://30boxes.com geo.wifi.uri: https://www.googleapis.com/geolocation/v1... social.manifest.facebook: ("origin":"https://www.facebook.com",... social.whitelist: https://mozsocial.cliqz.com,https://now.msn.com... yahoo.ytff.search.popup_src: http://toolbar.yahoo.com/bh/v8/search... ...(more settings with mozilla.org addresses)
4. Research on the Web to understand what those web addresses are used for, also to see if you can trust them.
For example, "mozsocial.cliqz.com" is social tracking and news provider. It can be trusted.
I don't know why "browser.search.defaultengine: Ask.com" is still there, since I removed it from the search engine list earlier.
The picture below shows some search engines installed in Firefox:
Last update: 2013.
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