Strange new tabs open

[FredMcD-HotMail]

Good day. When I right click on a link I want to save, the browser opens a strange new tab.
I traced this tab to the Right Links add-on. Why does this happen? I don't want/need these on my browser.
++++Right Links add-on.txt

[Infocatcher]

You can hold any modifier (Ctrl or Shift) to not open link in new tab after right-click.
Or press down right mouse button and release after delay.

Unfortunately there is no easy way to automatically detect downloadable links.