Marketplace Auto-Scroll Scraper

Features - Auto-scrolls Facebook Marketplace for a user‑set duration with Start/Stop controls and live status. - Optional search text input that navigates to Marketplace search results before scraping. - Collects listing fields: `item_id`, `title`, `price` (currently detected via `฿`), `location`, `url`, `image_url`, and de‑dupes by `item_id`. - Auto‑exports a CSV when a run completes; manual “Export CSV” on demand. - Saves the latest CSV + row count + timestamp to local extension storage. - “Analyze Latest Results” shortcut and a full “Price Insights” dashboard. - Insights dashboard accepts CSV file upload or pasted CSV text and validates required columns. - Computes price metrics: average, median, best deal, and IQR‑based outlier bounds. - Adjustable outlier sensitivity, optional price floor, and histogram bin controls. - Visualizations: price distribution histogram and price‑by‑year trend line. - Segment‑by‑year table with count, average, median, and best deal. - Full data table with filtering, sorting, and modes (all/valid/filtered/outliers). - Warnings for low sample sizes or missing year data. - Insights run fully offline and only use local CSV data. - Minimal permissions and host‑scoped to `facebook.com/marketplace`. Benefits - Saves time versus manual scrolling and copy/paste. - Produces consistent, structured CSVs that are easy to analyze or import elsewhere. - Makes pricing decisions easier by surfacing averages, medians, outliers, and best deals. - Quickly reveals market distributions and year‑based trends. - Lets you iterate faster by reusing the latest scrape without re‑exporting. - Keeps data local/offline for privacy and speed. - Limited permissions reduce risk and scope.