Dillo is a very small and fast web browser written completely in C. The uncompressed source code tarball is approximately 1.2MB and the resulting executable file is 1.1MB. While Dillo is based on GTK+ ...

Dillo has plugins, providing e.g. Gemini protocol, man pages or reader view using rdrview. You can block domains using domainrc file or /etc/hosts file, you can block cookies using cookiesrc file.