To open an anchor in a tab in the background in Firefox, you hold the Command key (Control on the PC) while clicking the anchor. If you do not hold Command, then the current tab will be refreshed with the response of the HTTP request to the URL of the anchor.
I find that I open pages in background tabs more ofthen than I replace the page in the current tab. Because of this usage pattern, I want to reverse the behaviour of Firefox in relation to opening tabs in the background. Specifically I would like to have it so that clicking without holding the Command key opens the anchor in a background tab and clicking with holding the Command key refreshes the current tab.
How can I accomplish this?