Thanks! And good point about the logs, I'll remove them in the next release.

Yes it's scanning the DOM for changes in src/href because I noticed that some pages insert images dynamically, mainly SPAs that aren't server side rendered. I'm currently looking into an alternative approach where I intercept outgoing HTTP requests to imgur.com in order to redirect to the duckduckgo proxy, though I'm still not sure if it's feasible with manifest v3