Opera ditched their browser engine. They use chromium now.

I used to have an addon for this exact scenario that would auto-update the bookmarks as I read. It may have been this one, but it doesn’t appear to support mobile.

Firefox on Android allows selecting multiple bookmarks or a folder to open all at once, and its 3 taps from the Firefox mobile start page to get to my desktop’s bookmarks toolbar.

I don’t get why people are so resistant to using bookmarks. This is literally their purpose.
This isn’t a hard problem. Nobody needs to keep 400 tabs open. You aren’t reading them all at the same time.

Bookmarks are synchronized, grouped by folders, and don’t disappear unless deleted.
You can open an entire folder with a couple taps. You can switch between tabs with a couple taps or a swipe on the toolbar.