FIRE Number Calculator Overlay

WHAT IT DOES This script scans personal finance and retirement planning pages for income, expense, and savings data, then displays a floating overlay calculating your FIRE (Financial Independence, Retire Early) number. It extracts monthly/annual income, expenses, and savings rate from the page, calculates the FIRE number using the 4% rule (25× annual expenses), and shows a summary with color-coded indicators: green for on track, yellow for close, red for behind. A breakdown shows current savings, required savings, and years to FIRE. A one-click export function saves FIRE data as CSV or JSON. All FIRE snapshots are stored per domain locally for tracking over time. WHERE IT RUNS Works on any personal finance or retirement planning page—Mint, Personal Capital, retirement calculators, budgeting dashboards, or any page displaying income, expenses, or savings data. The script detects financial data using common patterns and selectors, making it compatible with most finance websites. HOW TO USE The panel appears automatically when you visit a finance or retirement page. It detects your income, expenses, and savings data, then calculates your FIRE number based on the 4% rule (annual expenses × 25). The FIRE number card shows the target amount with a color-coded status badge. A progress bar shows how close you are to your FIRE goal with current savings and target amount. Summary stats show annual income, annual expenses, and savings rate. Years to FIRE is calculated based on your annual savings rate. Monthly income and expenses are also displayed. Set your preferred withdrawal rate (3%, 4%, or 5%) using the dropdown—click "Apply" to recalculate. Click "Refresh Data" to rescan for updated financial information. Export FIRE data as CSV for spreadsheet analysis or as JSON for programmatic use. Use "Clear History" to reset stored snapshots for the current domain. The panel automatically saves a snapshot each time you visit, building a history of your FIRE progress. TECHNICAL MECHANISM: FINANCIAL DATA EXTRACTION WITH FIRE NUMBER CALCULATION AND PROGRESS TRACKING The script uses a comprehensive detection strategy. It scans the page text for annual income using patterns like "Annual income: $[amount]" and "Income: $[amount] per year," and monthly income using patterns like "Monthly income: $[amount]" and "Income: $[amount] per month." Expenses are extracted using patterns like "Annual expenses: $[amount]" and "Expenses: $[amount] per year" or monthly equivalents. Current savings are extracted from patterns like "Current savings: $[amount]" and "Savings: $[amount]." The savings rate is extracted from patterns like "Savings rate: [number]%" or calculated as (income - expenses) / income × 100 when not directly available. The FIRE number is calculated as annual expenses divided by the withdrawal rate (default 4%). The progress percentage is calculated as current savings / FIRE number × 100, and color-coded status is assigned based on progress: ≥100% = green, ≥50% = light green, ≥25% = yellow, ≥10% = orange,