I am using Linut Mint 17.3 Rosa Cinnamon, and Firefox 58.0.2, but I had the same problem with earlier versions of Firefox.
I have a folder of links to various news websites. They all work correctly, except for links to
https://www.sciencedaily.com/ . I have tried several times.
I make the links (as all the add-ons I have tried - several of them, probably all of them - do not work in Linux) by dragging the (i) symbol at the left of the address slot onto the desktop. For every other link I use, this works as expected and opens the webpage in a Firefox tab.
But when I click on my ScienceDaily link, it just opens gedit. I have no idea why it opens gedit.
To see if I could get around this by using another method, I tried saving the ScienceDaily page as a bookmark, which I could then drag to the desktop and use as a link. This works with all other webpages I have tried. But with ScienceDaily I get the same problem as before - it opens gedit and not Firefox, even if I have Firefox already running. Although the actual bookmark to Science Daily does work as expected.
Why does ScienceDaily.com not work as a link?
Thanks.
(p.s As I have already tried every Firefox add-on that can make links, and none of them work in Linux - even the ones that say they will work in Linux - , then they are unlikely to be a solution).