Unfortunately, Vivaldi is proprietary/closed-source... and of course, using it results in supporting the Chromium browser monopoly / Google Eco-system.

This is also my main reason to use Firefox. I generally like Firefox, but I find Chromium more snappy. But it's Google. The Manifest V3 changes were the nail in the coffin for me.

Unfortunately I still have to use it when developing with Flutter, but otherwise I try to avoid it where I can.

Proton is what made me come back to Firefox after many years.

It finally didn’t look cramped and complicated anymore.

Use sidebar tabs. Most websites don't use the full width of your screen. So, it makes total sense to put tabs in the sidebar, instead of them taking up valuable vertical screen state.

sidebar tabs are so great. more horizontal space for the title, reduces tons of whitespace in 99% of sites, hierarchical collapsing in many (ya like tab groups? tree-style-tabs users have had them for a decade already), and it's easy to make them use little vertical space.

it's such a no-brainer, I'm surprised it's not a first-class feature in the main browsers (I'm aware that it is built in or default in a number of niche browsers).

>it's such a no-brainer, I'm surprised it's not a first-class feature in the main browsers

Its one of those things like dark mode, where power users strongly request it for decades, yet corporations push back against it every time. And much the same as dark mode, I predict that all the same corporations will suddenly have a change of heart the second Apple starts implementing it.

Edge has this implemented in a pretty decent way.

Brave as well.

That would be great if there was an option to get rid of the tabbar at the top

Inside your profile folder, open or create chrome/userChrome.css

    /* to hide the native tabs */
    #TabsToolbar {
        visibility: collapse;
    }
    
    /* to hide the sidebar header */
    #sidebar-header {
        visibility: collapse;
    }

TreeStyleTabs author lists some more elaborate css [1].

[1] https://github.com/piroor/treestyletab/wiki/Code-snippets-fo...

I remove the horizontal tab bar in all of my Firefox profiles:

https://superuser.com/questions/1424478/can-i-hide-native-ta...

Vivaldi is great I love the vertical tabs and the F2 menu but it's still so dog slow.