Applications :: Browser - Changing Initial Placement Of New Tabs

Tabbed browsing has introduced a new browsing paradigm in which one can rapidly open many pages linked from specific articles or aggregation sites to read at a later point. Having adapted this paradigm and used it widely in my browsing habits, I have noticed that it falls short in a few instances. Often, I will open a list of tabs and then start reading through the pages left to right. At each page, I may want to open additional links from that page into new tabs in the current window. However, when I do so, they appear at the end of the list, sometimes many tabs away from the related article.

What I would like to see is a preference or a modifier key that would cause additional tabs to be opened immediately after the current tab but before the following tabs in the list. This would allow me to group related tabs more easily. This would probably work best as a modifier key rather than an option in the browser preferences, since the current behavior may be desirable when a series of tabs are opened in order of importance or chronology.