So in an attempt to narrow down the issue, I started Firefox in Safe Mode, and then the links loaded perfectly, which proves that one of the web browser security add-ons would likely be malfunctioning.
So then I decided to turn off one of my Firefox security add-ons one at a time in order to find the culprit, and it turned out that the Electronic Frontier Foundation's HTTPS Everywhere is responsible, because as long as I keep it off, the issue disappears.
This coincides with the fact that this issue neither affects MS Internet Explorer nor MS Edge, in which I do not have the said add-on, because it is not available for these browsers.
In the Firefox add-ons page the said add-on shows up as OUTDATED, along with VTzilla. Others are Ghostery as well as µBlock Origin, both of which are updated.
After reading about Firefox add-on technology is modernizing, and concidering that most, if not all webpages now use HTTPS only anyway, my question is as follows;
Will the EFF update HTTPS Everywhere any time soon or has it become abandonware?
Thank you very much in advance!
Edited by midimusicman79, 05 September 2017 - 09:28 AM.