Jan 30 2008
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Using Iceweasel with addons.mozilla.org (firefox plugins)
Out of the box, I wasn’t able to get plugins to download for Iceweasel. I assumed it was a user-agent problem.*
Not true! Apparently, Iceweasel comes with IPV6 DNS enabled. You probably don’t want this.
Type in “about:config”, search for ‘ipvs’, and make sure that ‘network.dns.disableIPv6’ is set to TRUE. Restart your browser.
via Re: [SOLVED] Firefox Add-ons Won’t Install
*you DO have to change the user agent if you want to install Google Browser Sync (which you do, trust me — it’s fantastic).
type ‘about:config’, search for agent and change ‘general.useragent.extra.firefox’ so that ‘Iceweasel’ is replaced with ‘Firefox’.
Shame on you Google for not including Iceweasel in your agent check.