What it does
When you finish selecting text with the mouse on a web page, Text Copier copies that selection to the clipboard. That is all. The text stays in your computer's clipboard until you copy something else.
What it does not do
- keep a history of your selections;
- send selections, page addresses or browsing history anywhere;
- show ads or change pages.
One thing to keep in mind
Because every selection is copied, the clipboard changes more often than you may expect. If you select something sensitive by accident, copy something else to replace it.
The full policy is on the privacy page.