Brilliant implementation. Clear and easy to read. Thanks. One suggestion (which probably follows on from others) is to give the option to disable columns and also maybe move columns? For instance Reddit is placed right over on the right on my page, requiring a scroll. I'd prefer to swap Instagram and Reddit to avoid the sideways scroll.

I also like @alfnor's suggestion for custom search profiles which could lump together specific sources for specific searches. Maybe a Premium option for a fee?

[Edit: also maybe an option to lock different columns together, so you can scroll them together to save scanning time?]