Error while installing Chromium extension: "Package is invalid: 'CRX_FILE_NOT_READABLE'."
I just clicked on the Chrome extension to install it in Chromium in Ubuntu Linux and I immediately got the error "Package is invalid: 'CRX_FILE_NOT_READABLE'." Is this a problem with the extension or with my setup? I'm assuming that Chrome extensions are supposed to work in the open-source Chromium browser.
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Upgrade Storage
Try the usual stuff: restart chromium, clear cache, try a different network etc.
Also, to be sure, you're downloading from here, right?
http://www.zotero.org/support/3.0#zotero_standalone
and follow up on that thread with any further questions.