Hi, Neilio, and welcome to HiveWire. I'm so sorry you're having trouble with this. I'm not clear what's happening. I use Firefox (v 56) and just added it without any issues.
Can you try logging out of and then back into your account and see if that solves it? If not, can you please contact Support for help?
Help
Can you try logging out of and then back into your account and see if that solves it? If not, can you please contact Support for help?
Help