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This is a cool demonstration, but it also makes me wonder why this couldn't be an option in something like about:config.

Wouldn't editing source like this make your mobile software difficult to patch? If so, it seems like it would be a security risk.

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True, if you would want to persist these changes you should handle your own updates (have a branch and apply upstream changes on top of it). These changes will currently be overwritten by an OS update.

> Wouldn't editing source like this make your mobile software difficult to patch?

Why? Looks pretty easy to me.

> If so, it seems like it would be a security risk.

How?

Right now I'm thinking of this in terms of git rebase. Can the package manager in Firefox OS handle local backports upstream? Would an update to a given Firefox app wipe my changes automatically by default? Would an update to a given Firefox app never occur automatically by default because of my local changes?

In other words, if I edited the source of this app on my hypothetical Firefox OS, would I be damned for the rest of eternity to either upgrade manually, or wipe my local changes? The security risk I'm concerned about is "my software isn't up to date with the latest patches therefore it is at risk."

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