I got a Panic Kernel Error

Is this the only Kernel Panic? If you have had other Kernel Panics, then it would be useful to post a few more Kernel Panic logs to see if there is a pattern. The current panic log does reference the Brother printer.

FYI, did you actually try to use Chrome to access the government website? Most times any browser will work. If Firefox is reported to work, then you should use it if you are running macOS 10.12+. Many website operators are just pure lazy and don't take the time to properly check their websites. Since Micrsoft Edge uses the same rendering engine as Google Chrome, then Chrome should work as well. I have used "unsupported" browsers on many sites over the years without any issues. I'm sure there are a few sites out there which will only work with Internet Exlporer.

I just installed Microsoft Edge to a Mac I was testing as I was just curious as to what it was like. I don't like how it was almost 400MB in size which is huge when another browser based on Chromium was less than 100MB. Microsoft doesn't have the greatest track record for their software. Firefox is a much better choice.

That was a page fault, a reference to memory not owned by the process making the reference. It occurred in the brotherPrint and Scan task. The graphics (screen) drivers were present at the "scene of the crime".

Running 10.15.5 with no added kernel extensions.

You should upgrade to 10.15.6, so that if this problem has already been seen and solved, you can enjoy the solution.