Short Demo Video
open a site with table like data, (optional) click the toolbar button to highlight the exportable tables and lists (if the section you want to export does not get highlighted, then it's likely not a valid HTML table-like structure and you'll have to look for another custom solution like a userscript to extract the data you want), right click inside of a highlighted area to open the context menu, in the context menu select "Table to CSV" > "Export as TEXT" to export only the text inside the cells or use "Export as HTML" to export the HTML code inside each cell. If you need more features than this simple addon can provide, you can also take a look at Table Capture
Some additional notes & hints