For anyone who this might apply to; I did my TM30 online for the first using Google Chrome on Friday and went to immigration today to check the status. No problem at all, and the immigration officer pleaded with me to continue doing it online rather than take up their time.
I was going to try the Section 38 app but doing it online was simple, and it works.
TLDR : Answer Summary
The post discusses a user's successful experience completing the TM30 online for immigration in Thailand. They found the process straightforward and were encouraged by an immigration officer to continue using the online method rather than visiting in person. Other comments affirm the ease of using the online system, share experiences with TM30 violations, and one user requests the online link for submitting TM30 forms.