On any page containing a table, click the filter button:
Textboxes will appear on the top of the table:
Type in any textbox to filter the table:
Filters can also be negated by prefixing them with a minus (-). To remove all entries in the table which contain Oil enter -Oil.
Instead of the plugin, you can use this bookmarklet. Create a new bookmark and copy-paste the contents of this file into it. Then browse to a page containing a table and click your bookmark.