Just tried to log-on to check the status of my own application and yes the website is indeed down. I honestly don't get why this website is so difficult for the immigration to maintain. I guess it will be another hour journey for me next week :/
I'll definitely keep an eye on it and know well that I could be hitting the road in 14 days to do the 90-Day report at the office. My office is Nonthaburi by the way so I'm not hopeful of this leaving the pending status. I remember originally when the online reporting was introduced I went to the office and the officer told me not to do it online because it all goes into ''big database Bangkok, we not know, we not know''.
I just completed the application with the Chrome Extension mentioned above and it worked like a dream. This morning when I first started trying, I got that ''Message from webpage'' after I agreed to the terms and conditions but at that point I hadn't entered any of my details and it just continued to next screen when I clicked OK. I tried several times after and there was no popup like that and just now completed/pending using the Chrome extension.
I know they specify Internet Explorer but I only have Chrome, Firefox and Microsoft Edge. Been honest, Edge worked much faster than the other 2 but all 3 gave the same result. I will give it a try with Internet Explorer later when I get to the office. I know some of the computers there still have it. Thanks.