Please consider adding a feature or setting option, let users choose whether resize or not. As for me, I think it is a little ugly to resize the panel, especially in the absence of resize animation. The current solution is somewhat crude, in my opinion.

@mevans5527 Which version of Vivaldi are you using on which version of Windows? Can you share a link to the topic you found earlier?

I am not sure if it is a bug or intentional. I see no use for it if it is intentional. Vote for Hide UI Per Window

@zook The default shortcuts are F8 and Ctrl+L, but one can assign Alt+D or any other available shortcut too. Add Alt+D as a Default Hotkey for Focus Address Field

@hadden89 I guess the way to find out is to try the extension. It looks OK on my portrait monitor with tiled tabs, but there are issues with the control bar popup as clicking anywhere on the control bar just stops and starts playback.

@dnichk No, not currently.

@hehe I am just a Moderator, only Dev's are able to do it. I suggest you start a topic here

Re Autohide: Vote for the existing feature request Option to Autohide Tab Bar / UI

@derday thanks for the information

Something discovered on /r/vivaldi: You can get fullscreen mode with all the UI elements enabled in full: Press F11 (fullscreen) Press Ctrl+F11 (Hide UI) This seems like buggy behaviour, but honestly, this seems to be a solution to what many people above were asking for.

Tab Thumbnails should also be visible per window.

@dLeon has already answered your first question. You can turn that on in the settings here: vivaldi://settings/search/ (open this link in a new tab or copy & paste it into the address bar). Though I can search directly from the address bar, even when "Search in Address Field" is unchecked. You can use other search engines in the address bar, by using their nick names (you can set them yourself). You can find out more about the search functionality in the Official Vivaldi Knowledgebase. You can also check out this tutorial.