I'm a long-term user of Fido and their site, and I can confirm to you that they have badly screwed up their recent site revamp. Although I do get past the login (with Firefox 43 on Win Vista), there are endless problems once I'm inside. I have complained a few times. Things are also changing there every few days, so they are working on it, but there is clearly a major incompetence in the current programmers - not just the programming itself, but even common sense - you currently can't edit your e-mail address nor some parts of your physical address.
Similar but not identical problems have also been introduced in the recent Rogers site revamp - probably the same programmers.
Another example of retarded programming - at least recently (I don't check every day) - the date sort order in the "recent invoices" pulldown/selector is/was by character form of month, i.e., Aug, Dec, Jul, Nov, Oct, Sep for the last several months.