Hey, I'm really sorry you lost your progress! I'm afraid this is something that sometimes happens with browsers and I can do nothing to bring it back.
However, I can give you a save file with lots of resources that may help you to get up to speed: https://florianvanstrien.nl/files/TheFinalEarth/saveWithLotsOfResources.sav (right click/hold -> save link as)
Let me know if you need this for another scenario!
In the future, it's a good idea to regularly Export your save file from the Game Menu.