@andrew84 said in Opera 73 developer:
@andrew84 it seems that Opera on Presto had this feature since 10th version. Far better solution than the Ctrl+Tab cycler.
They are for different purposes (note that Presto also had a tab cycler). Disclaimer: I've worked on all these features, both the historical ones in Presto and the current ones in Opera.
The tab cycler allows you to switch between recently used tabs. The general idea is that you find the tab you're looking for either immediately (last tab used) or by scanning the first 2-3 items. You can go further if it turns out it's longer ago, but this is the exception, not the rule. Similar to the application switcher in macOS (Cmd+Tab) or Windows (Alt+Tab).
You might not be the type of user that often switches between recently used tabs. That's fine, then Tab Cycler is not for you. It doesn't mean it's not useful for others that do work this way.
Showing thumbnails of tabs on the tab strip allows you to contextually find a tab, especially if you haven't seen it for a while but you have a visual memory of either what it looks like or where in the tab strip it was located. It doesn't help at all to switch quickly between recently used tabs, especially when there are many, but it helps if you're looking for a tab you know is somewhere. Similar to the Dock on macOS or the task bar on Windows, or maybe Expose on macOS.
Opera doesn't have a way to see a thumbnail overview of the whole tab strip right now, but it does have a contextual overview of tabs in Search Tabs. The feature we had in Presto for sure was handy for some people, but the effort needed in making it appear meant that it was tragically underused, and a new effort to bring a tab strip visualization would have to improve on that.