User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b5) Gecko/20051006 Firefox/1.4.1 Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b5) Gecko/20051006 Firefox/1.4.1 When firefox blocks an extension installation and the user clicks 'edit options' the only way to proceed with installation is to add the source to the trusted sites list. I think that this should be similar to popup blocking, that lets the user show a popup window without adding the site to the trusted sites list. It sounds like a solution that could compromise security, but the current behaviour drives the medium user to permanently add a source to the list everytime he/she wants to install an extension. Reproducible: Always Steps to Reproduce: 1. Try to install an extension from an untrusted site; 2. Click 'edit options'. Actual Results: Firefox shows the trusted sites list, asking if the source must be added (by showing the misleading 'allow' button). Expected Results: Firefox should behave as it does when blocks pop-ups. It should show a list of options like this: 1. Allow installation only for this time 2. Change trusted sources list

*** This bug has been marked as a duplicate of 252830 ***