12 year old bug about #Firefox not using OS X Keychain: https://bugzilla.mozilla.org/show_bug.cgi?id=106400 … For now, you can use an add-on: https://addons.mozilla.org/en-US/firefox/addon/keychain-services-integration/ …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more