You've just launched a browser extension. How do you grow/promote it?

The extension is a productivity tool for individuals and teams.

So far, I've done:
– Reddit posts (this one helps: https://anvaka.github.io/map-of-reddit)
– Asked to be posted on PH (DemandCurve has a great post about it, called "Product Hunt Launch")
– Launched a small Reddit ad campaign on r/productivity, r/startups and r/digitalnomads
– BetaList (and other similar pages) submissions

Is there anything else one could think of?

PS https://getseekr.xyz is the landing page – any roast highly appreciated!