Firefox extension to automatically verify the ISO checksum
We are planning to create a custom Firefox add-on to download and verify Tails using SHA-256 checksum.
#10 Updated by ma1 over 4 years ago
- Blueprint changed from https://tails.boum.org/blueprint/download_extension/ to https://tails.boum.org/blueprint/bootstrapping/extension/
As I told sajolida on the public list, while I do hope to have a prototype earlier, a realistic date is the beginning of August.
(Side note: the Blueprint link gave 404, changing it to what I've got).
#13 Updated by ma1 about 4 years ago
I'm currently having a bad time at updating the git repository, looks like my credentials are outdated.
The extension and the sniffing code work fine regarding:
1. certificate pinning
2. UI population from the safe data sources (e.g. download link and hash)
3. asynchronous sha256 verification of arbitrary local files ("I already have an ISO image" link)
4. revealing the verified file in the filesystem explorer (e.g. "Copy image to first USB stick").
What is currently broken is the synchronization with the download manager, but I hope to have it fixed by Monday.
Until I do it and figure out how to update the repo, you can play with both the web page prototype and the extension at
and download the sources from