Waterfox
Per-profile browsing in Waterfox builds up a disk-backed web cache that stores HTTP response bodies, decoded images, media fragments, compiled script bytecode, startup cache files, and GPU shader cache data so pages can reopen faster without fetching everything again. When those files become oversized or stale after site changes, browser updates, or graphics driver changes, Waterfox can keep serving outdated assets or spend time validating bad cache entries. Kudu removes only Waterfox’s disposable per-profile cache data, not bookmarks, saved passwords, cookies you rely on for sign-in, extensions, or browsing history.
Why clean Waterfox?
- Outdated cached CSS and JavaScript after a site deploy can make pages load with broken layouts, missing buttons, or login forms that never finish submitting until Waterfox fetches fresh copies
- A bloated disk cache forces Waterfox to spend more time indexing and evicting entries, which shows up as slow startup, sluggish tab restores, and pages that sit on Loading longer than expected
- Corrupted image and media cache entries can produce blank thumbnails, missing icons, or videos that stall at the first frame even though the same site works in another browser
- Startup cache files that no longer match the current Waterfox build can cause an unusually slow first launch, delayed extension UI, or temporary interface glitches while internal data is rebuilt
- GPU shader cache data from an older graphics driver can be invalidated after a driver update, leading to flickering page elements, black rectangles, or stutter during scrolling until the cache is regenerated
- Offline and web content cache growth across multiple profiles can quietly consume gigabytes of disk space, which users notice as shrinking free space and larger-than-expected Waterfox profile folders
Cache paths Kudu targets
Windows
%LocalAppData%/Waterfox/Profiles |
macOS
~/Library/Caches/Waterfox/Profiles |
Linux
~/.cache/waterfox |
~/.waterfox |
Common questions about Waterfox
Download Kudu and reclaim your disk space.
Available on Windows, macOS, and Linux. No account required, no feature gates, no telemetry without consent. All cleaning targets are open source and community-auditable.