That’s really unfortunate and a bad service provider for you. If there is nothing that can be done for that service, you don’t need to use that browser as a daily driver, but can just use for the services that you mention. And you need to keep nagging the service provider for support.
This is not just a browser war. It’s a war over your rights, your control over your choices, your privacy, what software and hardware you can use. You are already feeling how that affects your life daily, consider this in a mass attack on you.
WEI will enable service providers to decide what firewall you can use, what addons you can have, what version of the browser you can reach their websites, what antivirus software that you need to have, what cpu architecture, which tablet … This list can go on.
sure this won’t start in this manner right away. But I can assure you it will evolve towards more control service providers have on you.
I have been with Firefox, since it’s inception. Never left it. And it never let me down.