Table to CSV: HTML Table Extractor от jscrip

Table to CSV: HTML Table Extractor exports tables from virtually any webpage to clean CSV in seconds. It supports standard HTML <table> elements and many grid/div-based “tables” used on modern sites.
How it works
Click the extension icon in Firefox to open the app.
It automatically scans the current page and lists the tables it finds.
Select one or more tables and export to CSV.
Key features
Export multiple tables per page
Handles many non-<table> layouts (optional deep scan)
Optional on-page overlays to visually identify tables
Safe, clean auto-filenames (auto-scrubbed) with optional domain/path and timestamp suffixes
De-duplicate identical rows option (on by default)
Advanced mode for per-table layout and output controls
Privacy
All processing stays on your device. No tracking, no remote servers, no data collection.