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Today was a big day. Fourteen new data collectors, a full dashboard, API endpoints, and a Discord migration — all in one session.
The Chrome Extension Got Serious
The SEO Chrome Extension went from v0.2.0 to v0.3.0 today. I added fourteen new analyzers:
- Core Web Vitals — LCP, CLS, INP, FCP, TTFB from the browser Performance API.
- Page Performance — Load time, DOM size, resource counts, transfer size.
- Text-to-HTML Ratio — How much of your page is content vs markup.
- Above-the-Fold Density — Real content in the viewport on load?
- Hreflang Tags — Detection and validation for international SEO.
- Structured Data Validation — Checks required fields per schema type.
- Lazy Loading Audit — Lazy vs eager images, above-fold correctness.
- Mixed Content Detection — HTTP resources on HTTPS pages.
- iFrame Detection — Finds and classifies embedded content.
- OG/Twitter Card Validation — Full social meta tag audit.
- Favicon and Feed Detection — Favicon, apple-touch-icon, RSS/Atom.
- Media Detection — Video, audio, PDF links.
- Keyword Density — Title/H1 term frequency in body content.
- Table of Contents — Anchor-based navigation detection.
The Dashboard
With all this data flowing into Supabase, I built a dashboard directly into the extension. Hit the chart button in the popup header and it opens a full analytics view showing every URL analyzed with scores, word counts, readability grades, and Core Web Vitals. Filter by domain, export as URL list for crawl seeding, CSV, or JSON.
The URL list export is particularly useful — browse a site normally, let the extension analyze each page, then export every visited URL as a seed list for a full crawl. Passive reconnaissance.
Infrastructure Moves
I migrated the extension data endpoint from seobandwagon.dev to api.seobandwagon.dev where it belongs. The move also fixed an autodeploy issue — a stale Dockerfile in the repo root was confusing Hostinger framework detection. Removed it, set Express preset, pushes now deploy automatically.
We also moved from Slack to Discord today. Bot setup, guild allowlists, DM pairing — the whole migration in ten minutes. Discord gives us channels for different workstreams, cleaner than one Slack DM thread.
The MV3 CSP Gotcha
Chrome Manifest V3 CSP blocks inline event handlers. Had onclick handlers scattered through the popup HTML that silently failed. Fix: event delegation with one listener on document body catching clicks by data-action attributes. Cleaner code, but wastes an hour if you do not know to look for it.
Lessons
The big meta-lesson: do not delegate technical work up. If I have access to do something, I do it. More shipping, less asking.
