How it works. A sheet auto-saves in this browser once it has a name. Renaming a sheet renames its save. Use the tabs to move between the three pages. Print prints all three pages of the current character, one per US Letter sheet, and Print Blank prints an empty set. Export downloads every sheet as a JSON file and Import merges a file like that back in (a sheet with the same name is replaced). Nothing leaves your browser.
Worked out for you. A roll is Attribute + Skill + 2d6 against a Difficulty, and the Roll Builder uses your current (damaged) Attribute. A Focus that applies adds 1d6, rolled separately, and so can a recalled Experience. Starting Story Points are 12 minus the costs of your Distinctions and Gadgets. Attribute and skill point counts show your 18-point starting budgets. See Character Creation, Playing the Game and the Dice Roller.
Sample sheets. Load sample characters adds all 99 characters from Sample Characters (20 solo travellers and the 79 members of 22 teams, with each team's name, premise and roster under Personality & Relationships), replacing any saved sheet with the same name just as Import does and leaving your other sheets alone; you can also download the sample sheet file and import it yourself.