--- title: #web description: 15 articles about web — guides and explainers from the WatchFor team. canonical: https://watchfor.io/blog/tag/web --- [All posts](/blog) # #web Articles tagged "web". [All](/blog)[Monitoring](/blog/category/monitoring)[Networking](/blog/category/networking)[Performance](/blog/category/performance)[Security](/blog/category/security)[Reliability](/blog/category/reliability)[Email](/blog/category/email)[DevOps](/blog/category/devops)[Engineering](/blog/category/engineering) [All articles](/blog/all) 15 article s [SecuritySep 08, 2026 ## Clickjacking Explained: how an invisible frame steals a click Any website can load yours inside an invisible frame and let someone click your buttons while they think they're clicking something else. One header stops it, and almost nothing can go wrong by adding it.WatchFor Team4 min read](/blog/clickjacking-explained)[SecuritySep 08, 2026 ## Content Security Policy Explained: what CSP actually stops Your site works perfectly and still runs any script it's told to, from anywhere on the internet. CSP is the list that says which ones you actually meant — here's what it prevents, and how to switch it on without breaking your own site.WatchFor Team6 min read](/blog/content-security-policy-explained)[SecuritySep 08, 2026 ## MIME Sniffing and nosniff: when the browser guesses what your file is Browsers don't always believe you about what a file is — they look inside and decide for themselves. That guess is how an uploaded 'image' occasionally ends up running as code. One header ends the guessing.WatchFor Team4 min read](/blog/mime-sniffing-explained)[SecuritySep 08, 2026 ## Permissions-Policy Explained: switching off what your site never uses Your page can ask for the camera, the microphone and the visitor's location — and so can every script and iframe you embed, in your name. Permissions-Policy is how you say which of those your site actually needs.WatchFor Team4 min read](/blog/permissions-policy-explained)[SecuritySep 08, 2026 ## Referrer-Policy Explained: what every outbound link tells strangers Click a link on your site and the browser quietly tells the destination which page you came from — the full URL, including whatever is in it. Sometimes that's a reset token. One header decides how much gets sent.WatchFor Team4 min read](/blog/referrer-policy-explained)[MonitoringMar 02, 2026 ## CORS Errors Explained (and how to fix them) Every web developer meets the dreaded 'blocked by CORS policy' error. It's not a bug — it's a security feature. Here's what CORS is, why the browser blocks your request, and how to fix it properly.WatchFor Team3 min read](/blog/cors-errors-explained)[PerformanceFeb 28, 2026 ## ERR_TOO_MANY_REDIRECTS: causes and how to fix it When a page keeps redirecting to itself, the browser gives up with 'too many redirects'. Here's why redirect loops happen and the usual culprits behind them.WatchFor Team3 min read](/blog/too-many-redirects)[SecurityFeb 24, 2026 ## Mixed Content Warnings: what they are and how to fix them Your site is on HTTPS, but the padlock has a warning — or images won't load. That's mixed content: a secure page pulling in insecure resources. Here's how to find and fix it.WatchFor Team3 min read](/blog/mixed-content-warnings)[PerformanceJan 19, 2026 ## Caching Explained: browser, CDN and server caches Caching is the closest thing the web has to free speed: store a result once, reuse it many times. Here are the three layers of caching, how each works, and the one hard part — invalidation.WatchFor Team3 min read](/blog/caching-explained)[NetworkingJan 17, 2026 ## HTTP/2 vs HTTP/3: what actually changed HTTP keeps getting faster. HTTP/2 fixed how requests share a connection; HTTP/3 changed the connection itself. Here's what's different, in plain terms, and whether you should care.WatchFor Team3 min read](/blog/http2-vs-http3)[PerformanceJan 15, 2026 ## Gzip vs Brotli: web compression compared Text compression shrinks your HTML, CSS and JS before they travel — for free speed. Here's how gzip and Brotli compare, and which to use where.WatchFor Team3 min read](/blog/gzip-vs-brotli)[PerformanceJan 13, 2026 ## Web Font Performance: fast text without the flash Custom fonts make a site look great — and can quietly slow it down or make text vanish during load. Here's how to keep your typography both beautiful and fast.WatchFor Team3 min read](/blog/web-font-performance)[NetworkingJan 01, 2026 ## What is a Reverse Proxy? A reverse proxy is the front door to your servers — handling traffic before it ever reaches your app. Here's what it does, why nearly every serious site uses one, and how it differs from a forward proxy.WatchFor Team3 min read](/blog/reverse-proxy-explained)[SecurityDec 20, 2025 ## HSTS Explained: forcing browsers to always use HTTPS You redirect HTTP to HTTPS — but that first insecure request is still a risk. HSTS closes that gap by telling browsers to never even try HTTP. Here's how it works and how to deploy it safely.WatchFor Team3 min read](/blog/hsts-explained)[SecurityDec 16, 2025 ## What is a WAF (Web Application Firewall)? A regular firewall guards the network; a WAF guards your application — inspecting web requests and blocking attacks like injection and bots. Here's how it works and what it does (and doesn't) cover.WatchFor Team3 min read](/blog/waf-explained) --- Canonical page: https://watchfor.io/blog/tag/web · Site guide: https://watchfor.io/llms.txt