isTrust Firefox

Download isTrust

Download isTrust (current and past versions) for Firefox
Latest Version: 4.4.1 Updated: 4 months ago

Ready to install?

isTrust is available to install from Firefox Add-ons Store and for download from this page.
View source code
33
Daily users
5.0
3 ratings
0
Total downloads

Available versions

You can find the current and older versions of isTrust 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
4.4.1XPI · ZIP · Source code147.28KB02026-02-26
4.4.0XPI · ZIP · Source code147.29KB02026-02-22
4.3.0XPI · ZIP · Source code138.85KB02026-02-11
4.1.2Paid users only136.70KB02026-01-18
4.1.1Paid users only139.55KB02025-10-25
4.1.0Paid users only146.52KB02025-09-13
4.0.1Paid users only229.57KB02025-08-15
3.9.1Paid users only331.64KB02022-03-15
4.4.1 147.28KB
2026-02-26 · 0 downloads
XPI ZIP Source code
4.4.0 147.29KB
2026-02-22 · 0 downloads
XPI ZIP Source code
4.3.0 138.85KB
2026-02-11 · 0 downloads
XPI ZIP Source code
4.1.2 136.70KB
2026-01-18 · 0 downloads
Paid users only
4.1.1 139.55KB
2025-10-25 · 0 downloads
Paid users only
4.1.0 146.52KB
2025-09-13 · 0 downloads
Paid users only
4.0.1 229.57KB
2025-08-15 · 0 downloads
Paid users only
3.9.1 331.64KB
2022-03-15 · 0 downloads
Paid users only

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

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