My StartCom certification allows software makers, but AdBlock Plus will not install on OSX 10.4.11. 'Signing could not be verified -260'
Every attempt fails to install AdBlock Plus on OSX 10.4.11, producing only the "Signing could not be verified -260" message. Following instructions in a previous post about this, I looked at the “StartCom Certification Authority” and found it already checked to identify software makers. I have no idea how to either find or update the "nss" package. [Network Services Suite?] Can you tell me specifically where to look and how to do that? What else may help to solve the problem? If AdBlock Plus still will not install, what's the next-best product that includes turning off the intrusive google connection requests? How soon will you update Firefox itself with a simple toggle switch to turn that on and off?
== Every installation attempt fails.
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See https://adblockplus.org/en/known-issues#signing - the most obvious suspicion is that your Adblock Plus download has been manipulated (which is exactly what signing is supposed to prevent). It might be some application installed on your computer - or maybe you are simply installing from a third-party site rather than addons.mozilla.org.
you are testing me. i cannot install any addons or plugins in firefox. i am using 3.53
I get the same when trying to log into my bank account, when with "the other" browser I have no trouble at all. I get the same trouble (-260) with many sites.