"Failed to load resource: net::ERR_FILE_NOT_FOUND" at launch

[gorhill]

I often get this error at launch:

Failed to load resource: net::ERR_FILE_NOT_FOUND
    filesystem:chrome-extension://bmgihbijohdeghlojnnnpcageoekicik/persistent/assets___checksums.txt?ublock=1403611564239

Appears to be related to auto update occurring at launch. Need to figure what is happening. Appears benign otherwise, extension works fine thereafter.

[gorhill]

Never mind, it's caused by the fact that all the cached assets (as a result of an update op) are cleared when a new version is detected (because new versions ship with latest assets). Somehow chromium delete the cached file items, but the directory entry for these items still lingers a bit it seems. Anywho, the error case is all taken care by the extension, it will fall back to the non-cached version of the asset just as it is supposed to.