emilyp
posted this on Mar 04 10:10
If you are not sure what tweeting with your location is, please visit our About Tweet With Your Location help page for more information. Please note that this feature is currently only available for US users - Twitter's @support account will let you know when it's available in other countries.
Because tweeting with your location is disabled by default for everyone, you must first make sure you have enabled tweeting with location from your Account Settings.

Once you’ve enabled it, applications will be able to tag a tweet with your exact location. You can always disable it and remove all location history from the Settings page, as discussed below.
To tweet with your location on a per-tweet basis after you've enabled Tweet Location, click the crosshair icon
that appears below your update box on the lower left.
You will then be asked to let Firefox "Remember Your Location."

Make sure the "Remember for this site" box is checked, and that you click "Share Location."
Your location will then show below the update box.

If you no longer want to tweet with your location on your Tweets, simply click the "x" next to your location. This turns off Tweet WIth Your Location on a per-Tweet basis, meaning your location will not be shown until you re-enable it by clicking the crosshair icon. If you wish to disable Tweet With Your Location entirely, please read the following.
If you have already enabled Tweet With Your Location, you can disable it the same way you enabled it - from your Account Settings. Making this change only alters your settings going forward. To remove your location data from all your prior Tweets, you’ll need to follow the steps below.
There are two options for removing location data:

This can take up to 30 minutes, but it will scrub all location information from prior tweets. It is important to note, however, that this does not guarantee the information will be removed from all 3rd-party application’s copies of the data or external search results.