The download extension doesn't work on Chrome > 69

a user reported that with Ubuntu 18.10 and Chrome 70.0.3538.77, ahen trying to install the extension, it keeps returning to the installation page and the extension doesn’t appear to be installed.

Feature Branch: verification-extension.git:usbimage

Related issues

Related to #16098 (closed)
Related to #15995 (closed)
Is duplicate of #16098 (closed)

Original created by @goupille on 16087 (Redmine)

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