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When I click continue or purchase buttons on certain websites they don't respond

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This seems to be becoming more frequent, Sites that worked perfectly well before are now showing the same symptoms: the click through button does not respond at all. Oddly enough other click through buttons on the same page work perfectly well. I Think this might be a Java problem. Error console said: _dopostBack is not defined

This seems to be becoming more frequent, Sites that worked perfectly well before are now showing the same symptoms: the click through button does not respond at all. Oddly enough other click through buttons on the same page work perfectly well. I Think this might be a Java problem. Error console said: _dopostBack is not defined

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This is happening consistently for me since Firefox 4 and on many many websites. No problem with Firefox 3.

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Here's an example: http://www.mariner-outboard.com/mariner/en/product-selector.aspx# The "View my selection" button is dead.

A problem was reported along these lines in Bugzilla in 2009 but seemingly ignored. I wont report this in Bugzilla as last time I reported a problem I was slagged for being an amateur and not worthy of reporting problems!

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Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

If it does work in Safe-mode then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.

  • Use "Disable all add-ons" on the Safe mode start window to disable all extensions.
  • Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

In Firefox 4 you can use one of these to start in Safe mode:

  • Help > Restart with Add-ons Disabled
  • Hold down the Shift key while double clicking the Firefox desktop shortcut (Windows)