WEB.DE MailCheck for Firefox Firefox

Download WEB.DE MailCheck for Firefox

Download WEB.DE MailCheck for Firefox (current and past versions) for Firefox
Latest Version: 8.0.20 Updated: 19 days ago

Ready to install?

WEB.DE MailCheck for Firefox is available to install from Firefox Add-ons Store and for download from this page.
View source code
22,296
Daily users
3.0
128 ratings
0
Total downloads

Available versions

You can find the current and older versions of WEB.DE MailCheck for Firefox 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
8.0.20XPI · ZIP · Source code2.31MB02026-06-25
8.0.18XPI · ZIP · Source code2.61MB02025-12-03
8.0.17XPI · ZIP · Source code2.37MB02024-12-05
6.5.5Paid users only2.34MB02023-12-06
6.5.4Paid users only2.34MB02023-11-13
6.4.0Paid users only2.34MB02023-07-25
6.3.0Paid users only2.33MB02023-07-10
6.2.3Paid users only2.29MB02023-03-29
6.2.2Paid users only2.29MB02023-02-13
6.1.2Paid users only2.60MB02022-06-30
8.0.20 2.31MB
2026-06-25 · 0 downloads
XPI ZIP Source code
8.0.18 2.61MB
2025-12-03 · 0 downloads
XPI ZIP Source code
8.0.17 2.37MB
2024-12-05 · 0 downloads
XPI ZIP Source code
6.5.5 2.34MB
2023-12-06 · 0 downloads
Paid users only
6.5.4 2.34MB
2023-11-13 · 0 downloads
Paid users only
6.4.0 2.34MB
2023-07-25 · 0 downloads
Paid users only
6.3.0 2.33MB
2023-07-10 · 0 downloads
Paid users only
6.2.3 2.29MB
2023-03-29 · 0 downloads
Paid users only
6.2.2 2.29MB
2023-02-13 · 0 downloads
Paid users only
6.1.2 2.60MB
2022-06-30 · 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 WEB.DE MailCheck for Firefox ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the WEB.DE MailCheck for Firefox ZIP file from step 1. WEB.DE MailCheck for Firefox is now installed on your browser.

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