Developer Builds Free Open-Source NSFW Blocker After Personal Struggle with Online Content
A software developer has released BlockNSFW, a free, open-source browser extension for Chrome, Firefox, and Edge, after years of personally struggling with compulsive consumption of adult content online. The extension uses multi-layered filtering, including domain blocklists covering tens of thousands of entries, on-device AI image classification, and forced SafeSearch across nine search engines, with no data ever leaving the user's device. The developer created it after finding that existing blockers either lacked sufficient coverage or locked key protective features behind paid subscriptions. Version 1.7.3 introduced a PIN-gated system and an optional access code requiring users to manually retype a randomly generated string of up to 128 characters, designed to create friction against impulsive self-disabling. The project is MIT licensed and the developer has committed to never charging users for its core protection features.
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