I'm sure everybody does this: I like to go to "root" site and cherry pick links that interested in, opening them each in a new tab. I do this a lot for news sites like Google news. I also do it for Thesaurus.com for synonyms of a word I have.
Recently, I noticed this has stopped working consistently. Now, when I do that on synonyms listed on Thesaurus.com, it automatically loads the link in the current tab instead of presenting the context menu which would allow me to pick "open in a new tab".
Is this a problem with Firefox (I'm on 47.0 now, Windows 7, x64) or a problem with sites like Dictionary.com? The links look "normal", i.e. when I hover over them, they show the URL in the Firefox status bar. I know there are sometimes special kinds of links that run code which don't always invoke the context menu, but this doesn't seem to be the case.