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ACS 5.8 and Firefox version 52

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Rising star

There is a new version of Firefox due to be available tomorrow: March 7th. Firefox version 52

There are issues found when running patches 4,5,6 for ACS 5.8/ACS 5.8.1 where the login page for ACS cannot be displayed

There are two possible solutions for this

- Install ACS 5.8 patch 7 which was released at the end of last week

- There is workaround to configure firefox per the procedure below

set the "security.tls.version.max" parameter to "2" in Firefox version 52 by using the following procedure: 


  1. Open Firefox 
  2. In the address bar, type "about:config" and press Enter
  3. In the Search field, enter "tls". Find and double-click the entry for "security.tls.version.max

4. Set the integer value to "2" to force protocol of TLS 1.1. After ACS 5.8 patch 7 is installed, it is recommended to revert the workaround by setting the value back to "3", which is the default in Firefox version 52. 

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