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Such links usually have an onclick attribute that does the actual action.
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
You can use "Disable all add-ons" on the Diagnose Firefox issues using Troubleshoot Mode start window to disable all extensions.
You have to close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")
I am a ASP.NET developer and since upgrading Firefox I now get this problem all the time.
Error shown in Firebug is 'WebForm_DoPostBackWithOptions is not defined'.
Running in Safe Mode makes no difference.
I am behind a firewall but everything works fine in IE and Chrome (and used to in Firefox).