All versions of Browsium Proton.
This document details the release dates, version numbers, and end-of-support dates for Browsium Proton General Distribution Releases (GDRs) – releases that are available for evaluation kit download and are automatically updated on your organization’s Browsium Proton Download page. Use this article to determine which version of Proton you have installed on your system and its eligibility for hotfix support.
Browsium’s policy is to provide hotfix support to customers with active Support & Maintenance agreements for the current GDR (N) and prior GDR (N-1) at any given time. This policy only applies to major/minor version numbers (first and second digit only – e.g., Proton 4.0). Hotfixes released through the GDR channel (e.g., Proton 4.0.x) and Limited Distribution Releases (LDRs), which are provided to specific customers for specific issues, do not impact the GDR support lifecycle.
Browsium always recommends that all customers run the latest version of all Browsium products to ensure the optimal compatibility and rapid turnaround on support cases.
| Version | Release Date | End of Support Date |
| Proton 4.9.3 | 16 May 2022 | TBD |
| Proton 4.9.2 | 7 April 2022 | TBD |
| Proton 4.9.1 | 15 December 2021 | TBD |
| Proton 4.9 | 22 October 2021 | TBD |
| Proton 4.8.7 | 13 May 2021 | TBD |
| Proton 4.8.6 | 10 February 2021 | TBD |
| Proton 4.8.5 | 7 December 2020 | TBD |
| Proton 4.8.4 | 18 November 2020 | TBD |
| Proton 4.8.3 | 5 November 2020 | TBD |
| Proton 4.8.2 | 18 August 2020 | TBD |
| Proton 4.8.1 | 15 June 2020 | TBD |
| Proton 4.8 | 29 March 2020 | TBD |
| Proton 4.7.1 | 9 December 2019 | 22 October 2021 |
| Proton 4.7 | 23 August 2019 | 22 October 2021 |
| Proton 4.6.3 | 7 June 2019 | 29 March 2020 |
| Proton 4.6.2 | 31 May 2019 | 29 March 2020 |
| Proton 4.6.1 | 1 April 2019 | 29 March 2020 |
| Proton 4.6 | 7 January 2019 | 29 March 2020 |
| Proton 4.5 | 25 September 2018 | 23 August 2019 |
| Proton 4.4.2 | 27 February 2018 | 7 January 2019 |
| Proton 4.4 | 28 November 2017 | 7 January 2019 |
| Proton 4.3.1 | 29 June 2017 | 25 September 2018 |
| Proton 4.3 | 30 May 2017 | 25 September 2018 |
| Proton 4.2 | 3 February 2017 | 28 November 2017 |
| Proton 4.1.1 | 9 December 2016 | 30 May 2017 |
| Proton 4.1 | 18 October 2016 | 30 May 2017 |
| Proton 4.0 | 7 August 2016 | 3 February 2017 |
| Proton 1.2.1 | 16 June 2016 | 18 October 2016 |
| Proton 1.2 | 31 March 2016 | 18 October 2016 |
| Proton 1.1 | 7 December 2015 | 7 August 2016 |
| Proton 1.0 (technical preview) | 29 July 2015 | 31 March 2016 |
Version numbers for Browsium Client are visible in Windows Programs and Features and in each browser’s extensions management interface.
Proton 4.6.3 has version string 4.6.3.71. The Browsium Client Extensions for Edge, Chrome and Firefox are 4.6.1.
Proton 4.6.2 has version string 4.6.2.69. The Browsium Client Extensions for Edge, Chrome and Firefox are 4.6.1.
Proton 4.6.1 has version string 4.6.1.67. The Browsium Client Extensions for Edge, Chrome and Firefox are 4.6.1.
Proton 4.6 has version string 4.6.0.54. The Browsium Client Extensions for Edge, Chrome and Firefox are 4.6.1.
Proton 4.5 has version string 4.5.0.167. The Browsium Client Extensions for Edge, Chrome and Firefox are 4.5.0.
Proton 4.4.2 has version string 4.4.2.295. The Browsium Client Extensions for Edge, Chrome and Firefox are 4.4.7.
Proton 4.4 has version string 4.4.0.264. The Browsium Client Extensions for Edge, Chrome and Firefox are 4.4.7.
Proton 4.3.1 has version string 4.3.1.299. The Browsium Client Chrome Extension is 4.3.11 and the Firefox Extension is 4.3.11.
Proton 4.3 has version string 4.3.0.286. The Browsium Client Chrome Extension is 4.3.11 and the Firefox Extension is 4.3.9.
(Note: Original release was 4.3.0.284 prior to 5 June 2017 slipstream. See release notes for details.)
Proton 4.2 has version string 4.2.0.205. The Browsium Client Chrome Extension is 4.2.0.2 and the Firefox Extension is 4.2.1
Proton 4.1.1 has version string 4.1.1.137. The Browsium Client Chrome Extension is 4.0.0.9 and the Firefox Extension is 4.0.6.
Proton 4.1 has version string 4.1.0.130. The Browsium Client Chrome Extension is 4.0.0.9 and the Firefox Extension is 4.0.6.
Proton 4.0 has version string 4.0.0.277. The Browsium Client Chrome Extension is 4.0.0.8 and the Firefox Extension is 4.0.5.
Proton 1.2.1 has version string 1.2.1.351.
Proton 1.2 has version string 1.2.0.336.
Proton 1.1 has version string 1.1.0.273.
Proton 1.0 has version string 1.0.0.
See hotfixes for:
Proton 4.2
Proton 1.2
If you need additional assistance, please email Browsium Support.
Posted in: Proton Knowledge Base,
