OptiSearch Firefox

Download OptiSearch

Download OptiSearch (current and past versions) for Firefox
Latest Version: 4.2 Updated: 6 months ago

Ready to install?

OptiSearch is available to install from Firefox Add-ons Store and for download from this page.
View source code
144
Daily users
4.1
15 ratings
1
Total downloads

Available versions

You can find the current and older versions of OptiSearch 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
4.2XPI · ZIP · Source code1.22MB02026-01-11
4.1.2XPI · ZIP · Source code1.21MB02025-12-20
4.1.1XPI · ZIP · Source code1.20MB02025-10-01
4.1Paid users only1.20MB02025-09-28
4.0Paid users only1.21MB12025-07-06
3.9Paid users only1.20MB02025-06-02
3.8.3Paid users only2.38MB02025-03-09
3.8.2Paid users only2.38MB02024-07-09
3.8.1Paid users only2.38MB02024-07-02
3.8Paid users only2.38MB02024-06-23
3.7.2Paid users only2.37MB02024-03-25
3.7.1Paid users only2.37MB02024-03-20
3.7Paid users only2.22MB02024-02-19
3.6Paid users only2.17MB02024-01-09
3.5Paid users only2.03MB02023-11-12
3.4.2Paid users only1.92MB02023-09-12
3.4Paid users only1.89MB02023-08-08
3.3.1Paid users only1.88MB02023-06-05
3.3Paid users only1.89MB02023-05-25
3.2Paid users only1.88MB02023-04-18
3.0Paid users only1.88MB02023-03-25
2.3Paid users only1.86MB02023-01-22
1.5.2Paid users only1.79MB02022-04-05
4.2 1.22MB
2026-01-11 · 0 downloads
XPI ZIP Source code
4.1.2 1.21MB
2025-12-20 · 0 downloads
XPI ZIP Source code
4.1.1 1.20MB
2025-10-01 · 0 downloads
XPI ZIP Source code
4.1 1.20MB
2025-09-28 · 0 downloads
Paid users only
4.0 1.21MB
2025-07-06 · 1 downloads
Paid users only
3.9 1.20MB
2025-06-02 · 0 downloads
Paid users only
3.8.3 2.38MB
2025-03-09 · 0 downloads
Paid users only
3.8.2 2.38MB
2024-07-09 · 0 downloads
Paid users only
3.8.1 2.38MB
2024-07-02 · 0 downloads
Paid users only
3.8 2.38MB
2024-06-23 · 0 downloads
Paid users only
3.7.2 2.37MB
2024-03-25 · 0 downloads
Paid users only
3.7.1 2.37MB
2024-03-20 · 0 downloads
Paid users only
3.7 2.22MB
2024-02-19 · 0 downloads
Paid users only
3.6 2.17MB
2024-01-09 · 0 downloads
Paid users only
3.5 2.03MB
2023-11-12 · 0 downloads
Paid users only
3.4.2 1.92MB
2023-09-12 · 0 downloads
Paid users only
3.4 1.89MB
2023-08-08 · 0 downloads
Paid users only
3.3.1 1.88MB
2023-06-05 · 0 downloads
Paid users only
3.3 1.89MB
2023-05-25 · 0 downloads
Paid users only
3.2 1.88MB
2023-04-18 · 0 downloads
Paid users only
3.0 1.88MB
2023-03-25 · 0 downloads
Paid users only
2.3 1.86MB
2023-01-22 · 0 downloads
Paid users only
1.5.2 1.79MB
2022-04-05 · 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 OptiSearch ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the OptiSearch ZIP file from step 1. OptiSearch is now installed on your browser.

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