Install and manage add-ons הכל כל המאמרים והאשכולות באנגלית Filelink for Large Attachments Permission request messages for Thunderbird extensions Installing an Add-on in Thunderbird Install themes to change the look of Thunderbird Open Search Thunderbird add-ons - frequently asked questions How to Customize the New Mail Sound Unified Toolbar Certificates How to Install and Use another Language in the Dictionary on Thunderbird Add-Ons FAQ Add Search Engine to Open Search How can I digitally sign and encrypt emails? Installing and Using another Language in the Dictionary How to Customize Toolbars Unable to install add-ons (extensions or themes) in Thunderbird Unable to uninstall add-ons (extensions or themes)