MailFail Firefox

Download MailFail

Download MailFail (current and past versions) for Firefox
Latest Version: 1.0.21 Updated: a year ago

Ready to install?

MailFail is available to install from Firefox Add-ons Store and for download from this page.
View source code
108
Daily users
5.0
2 ratings
4
Total downloads

Available versions

You can find the current and older versions of MailFail 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
1.0.21XPI · ZIP · Source code527.89KB42025-03-04
1.0.20XPI · ZIP · Source code527.71KB02025-02-12
1.0.19XPI · ZIP · Source code527.42KB02025-02-05
1.0.18Paid users only526.96KB02024-06-28
1.0.16Paid users only516.13KB02024-06-27
1.0.15Paid users only516.03KB02024-06-19
1.0.14Paid users only516.93KB02024-06-13
1.0.13Paid users only516.48KB02024-06-04
1.0.12Paid users only461.77KB02024-05-22
1.0.11Paid users only461.44KB02024-05-15
1.0.10Paid users only460.70KB02024-05-10
1.0.9Paid users only446.51KB02024-05-07
1.0.8Paid users only444.67KB02024-04-18
1.0.7Paid users only454.66KB02024-04-08
1.0.6Paid users only433.80KB02024-04-02
1.0.21 527.89KB
2025-03-04 · 4 downloads
XPI ZIP Source code
1.0.20 527.71KB
2025-02-12 · 0 downloads
XPI ZIP Source code
1.0.19 527.42KB
2025-02-05 · 0 downloads
XPI ZIP Source code
1.0.18 526.96KB
2024-06-28 · 0 downloads
Paid users only
1.0.16 516.13KB
2024-06-27 · 0 downloads
Paid users only
1.0.15 516.03KB
2024-06-19 · 0 downloads
Paid users only
1.0.14 516.93KB
2024-06-13 · 0 downloads
Paid users only
1.0.13 516.48KB
2024-06-04 · 0 downloads
Paid users only
1.0.12 461.77KB
2024-05-22 · 0 downloads
Paid users only
1.0.11 461.44KB
2024-05-15 · 0 downloads
Paid users only
1.0.10 460.70KB
2024-05-10 · 0 downloads
Paid users only
1.0.9 446.51KB
2024-05-07 · 0 downloads
Paid users only
1.0.8 444.67KB
2024-04-18 · 0 downloads
Paid users only
1.0.7 454.66KB
2024-04-08 · 0 downloads
Paid users only
1.0.6 433.80KB
2024-04-02 · 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 MailFail ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the MailFail ZIP file from step 1. MailFail is now installed on your browser.

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