Open files window in chromium doesn't match rest of theme/fix home directory

So, this might be a bit nitpicky, but I have my theme set to Ambiant Mate Dark Orange and all the windows are dark which is great, but the open files window in chromium doesn't match the rest of this. Also, my home directory is set to /home/(user)/snap/chromium/1816, and i'd prefer to have it set to my regular home directory. is there any way to fix these things? Thanks in advance!

Chromium is installed as a snap, which is in this case a little bit comparable to a "jail" or "sandbox" so it can't see or reach the rest of the system (including the themes) which enhances safity but also introduces some inconveniences.

I do not understand what you mean by "my home directory is set to /home/(user)/snap/chromium/1816".
If I download a picture from a website with chromium I can easily save it in /home/(user) . Actually that is the default.
Can you elaborate a bit more about that problem ?