with that being said, there is some things that i believe will make the browser even better looking

1- Blur for the right click context menu and all the menus:
i would like the right click context menu to have transparency and blur to match the browser aesthetics.
opera's context menu :

example of what i want : Edge's context menu with blur and transparency

2- Consistency for the sidebar theme
Right now when clicking on messenger etc in the side bar it shows dark theme window
i would prefer it to have light theme window when in light mode
and dark theme window , when eventually dark mode arrives

3- the tab search theme is not consistent with the overall design and doesn't have blur like the address bar

it look like this :

while it should look like this

4- Hide bookmarks only for sites
Right now we can always hide the bookmarks or always show it
on other browsers , there is a 3rd option, to hide bookmarks only when you visit a site and show it on new tabs

5- finally
I would like to suggest that in the future if there is any element that require an accent color, it would match whatever the user os accent color is
for example if the user has red accent color for his windows os/desktop os , opera would take the red accent for anything that requires an accent.