Open iframes in new tab/window

Add the ability to open a Web page iframe in a new tab or new window by right-clicking on the iframe and selecting from a context menu.

The only options offered in the current Brave context menu are “View frame source” and “Reload frame”.

Netscape Navigator, Mozilla SeaMonkey and Mozilla Firefox have had this ability since the early days of the World Wide Web, and if I’m not mistaken, so did Microsoft Internet Explorer. The ability of browsers based on WebKit and its derivatives to do so seems to never have been implemented.