@leocg Yes, I already understand. To blame. I just wanted to reduce the number of topics created and put it all in one.
As to why these proposals should be implemented. Because it is convenient and I believe that it will be better to use. Especially in the chrome source, the bookmarks bar works exactly as I described. Well, the file size in downloads is a very small thing, a trifle that you also want to see in the interface. All browsers display the size of already downloaded files in the download interface. Even in the same chromium source.
To clarify, I've filed a bug report for the issue after every update that did not fix it
There is no need to do it. A well done bug report is enough.
If it take too long to be fixed, you can mention the bug number here (without the @ part to avoid it being spammed) so someone from Opera can notice it.