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Blocked By Content Security Policy

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I've just finished building a new machine and have installed Firefox:

ESR 45.9.0 (OS/2 port)

I want to sync it with my other machines but, when I try to log in, I get:

Blocked By Content Security Policy This page has a content security policy that prevents it from being loaded in this way. Firefox prevented this page from loading in this way because the page has a content security policy that disallows it.

I know the account is good, I'm logged onto it right now from another (Windows) machine; and I was able to log on and sync from the OS/2 machine this one replaced.

So what can I do to fix this?

Thanks.

I've just finished building a new machine and have installed Firefox: ESR 45.9.0 (OS/2 port) I want to sync it with my other machines but, when I try to log in, I get: Blocked By Content Security Policy This page has a content security policy that prevents it from being loaded in this way. Firefox prevented this page from loading in this way because the page has a content security policy that disallows it. I know the account is good, I'm logged onto it right now from another (Windows) machine; and I was able to log on and sync from the OS/2 machine this one replaced. So what can I do to fix this? Thanks.

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