WindowSizer Firefox

Download WindowSizer

Download WindowSizer (current and past versions) for Firefox
Latest Version: 1.6.0 Updated: 10 months ago

Ready to install?

WindowSizer is available to install from Firefox Add-ons Store and for download from this page.
View source code
1,454
Daily users
4.0
40 ratings
3
Total downloads

Available versions

You can find the current and older versions of WindowSizer 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
1.6.0XPI · ZIP · Source code61.99KB32025-09-01
1.5.3XPI · ZIP · Source code61.13KB02025-08-12
1.5.2XPI · ZIP · Source code61.12KB02025-08-05
1.5.0Paid users only60.84KB02025-08-03
1.4.2Paid users only60.04KB02023-06-28
1.4.1Paid users only60.05KB02023-04-19
1.4.0Paid users only60.08KB02020-11-06
1.6.0 61.99KB
2025-09-01 · 3 downloads
XPI ZIP Source code
1.5.3 61.13KB
2025-08-12 · 0 downloads
XPI ZIP Source code
1.5.2 61.12KB
2025-08-05 · 0 downloads
XPI ZIP Source code
1.5.0 60.84KB
2025-08-03 · 0 downloads
Paid users only
1.4.2 60.04KB
2023-06-28 · 0 downloads
Paid users only
1.4.1 60.05KB
2023-04-19 · 0 downloads
Paid users only
1.4.0 60.08KB
2020-11-06 · 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 WindowSizer ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the WindowSizer ZIP file from step 1. WindowSizer is now installed on your browser.

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