Gmail Input Lag/Freeze Mac OS Sierra
Gmail input lag increasingly severe over the last two weeks. I've done various combinations of re-start, cookie-clearing and cache dumping to no avail. For what it is worth to know, the small icons on the left of the address bar (show typed history, reader view, something I don't know...) sometimes - but not always - all flicker.
Vivaldi itself otherwise very responsive; this performance frustration is specific to mail.google.com/mail...
MacBook Pro 13" (early 2015) running Sierra 10.12.2
Vivaldi is 1.6.689.40
Browser extensions include AdBlock, LastPass, goo.gl url shortener, Google Voice, Boomerang, Pocket and Evernote clipper.