NewSync Firefox

Download NewSync

Download NewSync (current and past versions) for Firefox
Latest Version: 2.5.7 Updated: 3 months ago

Ready to install?

NewSync is available to install from Firefox Add-ons Store and for download from this page.
View source code
13
Daily users
5.0
2 ratings
0
Total downloads

Available versions

You can find the current and older versions of NewSync 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
2.5.7XPI · ZIP · Source code4.01MB02026-03-28
2.5.6XPI · ZIP · Source code4.01MB02026-02-17
2.5.4XPI · ZIP · Source code3.71MB02025-11-27
2.5.1Paid users only3.63MB02025-11-21
2.4.4Paid users only3.57MB02025-11-08
2.4.2Paid users only3.62MB02025-11-06
2.4.1Paid users only3.62MB02025-11-04
2.4.0Paid users only3.62MB02025-11-02
2.3.8Paid users only3.65MB02025-11-01
2.3.6Paid users only3.60MB02025-10-31
2.3.4Paid users only3.65MB02025-10-27
2.3.3Paid users only3.59MB02025-10-22
2.3.1Paid users only3.68MB02025-10-20
2.2.5Paid users only3.59MB02025-10-17
2.2.4Paid users only3.64MB02025-10-14
2.2.3Paid users only3.59MB02025-10-10
2.2.2Paid users only3.63MB02025-10-01
2.2.1Paid users only3.63MB02025-09-30
2.2.0Paid users only3.60MB02025-09-29
2.1.0Paid users only3.66MB02025-09-16
2.0.0Paid users only3.62MB02025-09-05
1.0.8Paid users only3.61MB02025-08-26
1.0.7Paid users only3.58MB02025-08-20
1.0.6Paid users only3.58MB02025-08-18
2.5.7 4.01MB
2026-03-28 · 0 downloads
XPI ZIP Source code
2.5.6 4.01MB
2026-02-17 · 0 downloads
XPI ZIP Source code
2.5.4 3.71MB
2025-11-27 · 0 downloads
XPI ZIP Source code
2.5.1 3.63MB
2025-11-21 · 0 downloads
Paid users only
2.4.4 3.57MB
2025-11-08 · 0 downloads
Paid users only
2.4.2 3.62MB
2025-11-06 · 0 downloads
Paid users only
2.4.1 3.62MB
2025-11-04 · 0 downloads
Paid users only
2.4.0 3.62MB
2025-11-02 · 0 downloads
Paid users only
2.3.8 3.65MB
2025-11-01 · 0 downloads
Paid users only
2.3.6 3.60MB
2025-10-31 · 0 downloads
Paid users only
2.3.4 3.65MB
2025-10-27 · 0 downloads
Paid users only
2.3.3 3.59MB
2025-10-22 · 0 downloads
Paid users only
2.3.1 3.68MB
2025-10-20 · 0 downloads
Paid users only
2.2.5 3.59MB
2025-10-17 · 0 downloads
Paid users only
2.2.4 3.64MB
2025-10-14 · 0 downloads
Paid users only
2.2.3 3.59MB
2025-10-10 · 0 downloads
Paid users only
2.2.2 3.63MB
2025-10-01 · 0 downloads
Paid users only
2.2.1 3.63MB
2025-09-30 · 0 downloads
Paid users only
2.2.0 3.60MB
2025-09-29 · 0 downloads
Paid users only
2.1.0 3.66MB
2025-09-16 · 0 downloads
Paid users only
2.0.0 3.62MB
2025-09-05 · 0 downloads
Paid users only
1.0.8 3.61MB
2025-08-26 · 0 downloads
Paid users only
1.0.7 3.58MB
2025-08-20 · 0 downloads
Paid users only
1.0.6 3.58MB
2025-08-18 · 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 NewSync ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the NewSync ZIP file from step 1. NewSync is now installed on your browser.

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