Not at all. Zen browser is trying to achieve Vivaldi UI on the Firefox browser - but more limited. Opera has been doing this for years...
More fluid tab experience looked nice - though I don't prefer vertical tabs, I liked that I could drag to make them bigger/compact, drag them to top/bottom/sides, and use a shortcut to HideUI.
HideUI is the single most loved feature of this 'Firefox' for me. To get rid of the tab/tool/URL bars, but have access (via keyboard/mouseover) is awesome... though better if we could assign something like F7 tabs F4 toolbar.
Personally I agree with split panes in browsers - but not that it's better to use desktop workspaces than have workspaces to contain browser tabs.
I think a 'mail' workspace is useful - especially if those tabs aren't running when you switch workspaces... haven't tried it yet, how's it much different to a 'mail' folder with bookmarks inside).
I can't understand people who want 100 tabs open. Neer happened to me, I think going on over 20 or 30 is getting crazy already and time to sort things out.
More fluid tab experience looked nice - though I don't prefer vertical tabs, I liked that I could drag to make them bigger/compact, drag them to top/bottom/sides, and use a shortcut to HideUI.
HideUI is the single most loved feature of this 'Firefox' for me. To get rid of the tab/tool/URL bars, but have access (via keyboard/mouseover) is awesome... though better if we could assign something like F7 tabs F4 toolbar.