Which is a safe way to record Firefox passwords in Gnome Seahorse Keyring?
Here is my analyze to the 4 possibible ways to record Firefox passwords listed in your question,
plus a new solution (#5):
Their are some notes to security in the README. It seems that it is not more or less secure then the original implementation. But for GNOME Keyring you have some options like auto-lock your keyring after a certain (idle) time.
Source can be found on the Add-On-site under "Version Info" -> "View the Source" and yes, it is from a spanish coder as you can see by following the link to the authors website. A drawback for this extension is the missing license which makes it no FOSS.
is the same as 2., Mozilla just localize their websites
Is just a packaged version of 1.
A new competitor seems to be this "GNOME Keyring Integration"-Add-On. It's licensed under the GPLv3 and is very lightweight. Source can also be found on the Add-On-site under "Version Info" -> "View the Source". So you can also take a full review.
After posting this question on an other Stack Exchange site,focused on IT security
I got this answer:
- add-on #1 is open source, so someone with a good knowledge could check if it is safe.
- add-on #2 and #3 are secret codes, so riskier
- solution #4, about PPA, is safe only if you trust the author
To sum-up,
with my level of knowledge and competence, there is no safe solution.
So I'll just wait till Ubuntu and Firefox produce an integrated solution without add-on needed...**