My friend, when you install something using the apt package manager you are using a .deb file. It’s something getting downloaded in the background from a server (debian.org or the brave one in this case) without you realising it. Make sense?
“Installing a Flatpak for example is a very valid answer and would definitely solve the problem” That wasn’t a useless comment. Although it would not have helped, it was still in the right direction. Useless comments are those claiming that I should stop using brave and just stick to firefox.
“You put the error in a screenshot which leaves it rather useless for searching the error in the web” I put the screenshot so that nothing is missed and I have seen this previously.
“In general, I’d say that you have very little error solving skills” I would say that you have very weak probabilty and statistics skill, if you can generalise the entire sample space with just a singleton event.
“and instead of thanking for “nothing” you should be thankful that people even bothered to answer.” Again, not directed to people who gave technical help or asked questions but only to those suggesting I just stick to FF or give up Brave.
“apt uses dpkg to install the deb file” Apt is a frontend for dpkg which needs a .deb file to install stuff. Apt searches for deb files in repos listed in sources.list, downloads them and then uses dpkg for installation.