Regain your saved locations in Google maps using this extension.
1. Save and Manage locations and labels
2. Autocomplete saved locations and labels as you type in search bar
3. Import and export saved locations between browsers
Sync saved locations with Google account
Pull data from contact addresses
When you visit Google maps you should automatically see a new tab "Saved Locations" after "My Maps." Click this tab and you will see a form with input fields where you can enter saved locations. Clicking "Save to Firefox" will save your locations to your local Firefox preferences and will be available thereafter. You can also import Export your saved locations data to KML format by selecting a file using BROWSE and then clicking "write to file" or "read from file." Note that you can import your old KML data that Google has made available by first downloading it here. To change the max number of save locations, Click on Tools->Addons->Google Maps Saved Locations->Options.
Download your old KML