Struggling to find users

I built a chrome extension that allows users to discuss different webpages as they are browsing. The real value for new users comes from having a community of commenters already using the extension. Since we dont already have this community, it's hard to convince new users to join, which in-turn makes building this initial user community a challenge. A chicken or egg problem. Further compounding the problem for us is that the chromestore displays the number of users using the extension, so when potential users see that the extension has very few users, they end up leaving. Any idea on how I can solve this problem? Any marketing ideas or places to target to acquire an initial userbase? For those curious, this the producthunt page of the extension: https://www.producthunt.com/posts/zeeker-2