Firefox ESR doesn't download updates

Hello, I have Windows 7 and I use Firefox ESR as my browser. It has work correctly for years now, but since a couple of days it has problems with downloading the latest updates. It asks me download the update but as I go into the settings page, the download is stuck at 0 kB. I also get a message box that FF is not able to download the update and it sends me to a Mozilla Firefox ESR download page and when I want to download the ESR version, FF cannot open the page with the installation file. Also many other links on the Mozilla page do not open or do not open correctly. Also it doesn't open this support page, I am writing this messages through my phone. Also it doesn't open the website bol.com. So what can I do. I have already tried clearing the cache and cookies. It doesn't help. I hope you can help.