Same. Huge fan of Opera 12, I was active in their community sites and reported bugs when possible. I'm glad to see them all coming back.
I'm skeptical of trusting Vivaldi Sync with my passwords, so that's turned off, but I use Vivaldi on my Linux desktop and Android phone, syncing bookmarks, notes, speed dials. Works great!
It's also hackable in the sense that the browser chrome uses plain old HTML/JS/CSS, so you could literally dive into `/opt/vivaldi/resources/vivaldi/style/common.css` and change the way the browser looks (may have to re-patch after every browser update).
I'm on an Ubuntu based system, so an apt-get Post-Invoke hook would do the job for me [1]. I haven't bothered though. I just manually run a bash script that appends my !important changes to the end of the file.
But apparently there's an official way to apply CSS mods using vivaldi://experiments/ and Settings > Appearance
I'm skeptical of trusting Vivaldi Sync with my passwords, so that's turned off, but I use Vivaldi on my Linux desktop and Android phone, syncing bookmarks, notes, speed dials. Works great!
It's also hackable in the sense that the browser chrome uses plain old HTML/JS/CSS, so you could literally dive into `/opt/vivaldi/resources/vivaldi/style/common.css` and change the way the browser looks (may have to re-patch after every browser update).