SmartDefine Firefox

Download SmartDefine

By: Shahin
Download SmartDefine (current and past versions) for Firefox
Latest Version: 1.0.2 Updated: a year ago

Ready to install?

SmartDefine is available to install from Firefox Add-ons Store and for download from this page.
View source code

Available versions

You can find the current and older versions of SmartDefine here. You can download the archived versions or inspect their source codes.

As a free user, you can download up to 3 latest versions.
Upgrade to download older versions
VersionDownloadSizeDownload countTimestamp
1.0.2XPI · ZIP · Source code103.00KB02025-07-03
1.0.2 103.00KB
2025-07-03 · 0 downloads

Install XPI file

An XPI file, short for "XPInstall," is a compressed file format used primarily by Mozilla applications, like Firefox and Thunderbird, to distribute and install add-ons or extensions. These files are similar in function to CRX files for Chrome but cater to the Mozilla ecosystem.
  • Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

  • Download the SmartDefine ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the SmartDefine ZIP file from step 1. SmartDefine is now installed on your browser.

Best SmartDefine Alternatives

Here are some Firefox add-ons that are similar to SmartDefine: