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My StartCom certification allows software makers, but AdBlock Plus will not install on OSX 10.4.11. 'Signing could not be verified -260'

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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.

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.

Additional System Details

Installed Plug-ins

  • -Runs Java applets using the latest installed versions of Java. For more information: Java Embedding Plugin. Run version test: Java Information.
  • Gecko default plugin
  • Java 1.3.1 Plug-in
  • Shockwave Flash 10.0 r12
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site.

Application

  • User Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.4; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3

More Information

Application Basics
Name
Firefox
Version
3.6.3
Profile Directory
Show in Finder
Installed Plugins
about:plugins
Build Configuration
about:buildconfig
Extensions
Name
Version
Enabled
ID
Modified Preferences
Name
Value
accessibility.blockautorefresh
true
accessibility.typeaheadfind.flashBar
0
browser.history_expire_days
0
browser.history_expire_days.mirror
180
browser.history_expire_days_min
1
browser.places.importBookmarksHTML
false
browser.places.importDefaults
false
browser.places.leftPaneFolderId
-1
browser.places.migratePostDataAnnotations
false
browser.places.smartBookmarksVersion
2
browser.places.updateRecentTagsUri
false
browser.startup.homepage
browser.startup.homepage_override.mstone
rv:1.9.2.3
browser.tabs.loadInBackground
false
browser.tabs.warnOnClose
false
dom.disable_open_during_load
false
extensions.lastAppVersion
3.6.3
font.name.serif.x-western
Verdana
network.cookie.cookieBehavior
1
network.cookie.lifetimePolicy
2
network.cookie.prefsMigrated
true
places.last_vacuum
1270522094
print.macosx.pagesetup-2
PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPCFET0NUWVBFIHBsaXN0IFBVQkxJQyAiLS8vQXBwbGUgQ29tcHV0ZXIvL0RURCBQTElT…
print.print_bgcolor
true
print.print_bgimages
true
print.print_command
print.print_downloadfonts
false
print.print_evenpages
true
print.print_footerleft
print.print_footerright
print.print_headerleft
print.print_headerright
print.print_in_color
true
print.print_margin_bottom
0.5
print.print_margin_left
0.5
print.print_margin_right
0.5
print.print_margin_top
0.5
print.print_oddpages
true
print.print_orientation
0
print.print_pagedelay
500
print.print_paper_data
0
print.print_paper_height
11.00
print.print_paper_size_type
1
print.print_paper_size_unit
0
print.print_paper_width
8.50
print.print_printer
print.print_reversed
false
print.print_scaling
1.00
print.print_shrink_to_fit
true
print.print_to_file
false
print.print_unwriteable_margin_bottom
57
print.print_unwriteable_margin_left
25
print.print_unwriteable_margin_right
25
print.print_unwriteable_margin_top
25
privacy.clearOnShutdown.offlineApps
true
privacy.clearOnShutdown.siteSettings
true
privacy.cpd.cookies
false
privacy.cpd.downloads
false
privacy.cpd.history
false
privacy.cpd.sessions
false
privacy.item.cookies
true
privacy.item.offlineApps
true
privacy.sanitize.migrateFx3Prefs
true
privacy.sanitize.sanitizeOnShutdown
true
privacy.sanitize.timeSpan
4
security.OCSP.disable_button.managecrl
false
security.OCSP.require
true
security.disable_button.openCertManager
false
security.disable_button.openDeviceManager
false
security.warn_leaving_secure
true
security.warn_submit_insecure
true
security.warn_viewing_mixed
false

Question owner

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.

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.

Question owner

you are testing me. i cannot install any addons or plugins in firefox. i am using 3.53

you are testing me. i cannot install any addons or plugins in firefox. i am using 3.53

Question owner

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.

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.