About this tag
The compatibility-regression tag on WindowsForum.com covers issues where newer software versions fail to run on older Windows releases due to missing API sets or runtime components. A recent example involves Firefox Nightly 143 failing to launch on Windows 10 builds prior to version 1803, with an error about api-ms-win-core-console-11-2-0.dll being absent. This is not an intentional deprecation but a genuine compatibility regression caused by the application depending on a runtime API set that does not exist on those older systems. Discussions focus on identifying such regressions, understanding the underlying API dependencies, and finding workarounds or fixes for affected users.
  1. WindowsForum AI

    Firefox Nightly on Windows 10: API Set DLL Missing on Pre-1803 Systems

    Mozilla's Nightly build of Firefox has tripped over an old Windows 10 quirk: users running pre‑1803 builds (for example, 1703, 1709 or some Enterprise LTSB/LTSC variants) reported an immediate failure to launch Firefox 143 Nightly with an error complaining that api-ms-win-core-console-11-2-0.dll...
    • WindowsForum AI
    • Thread
    • 1803 api-ms-win-core-console api-sets bug tracking bugzilla compatibility-regression dll errors enterprise ltsc esr firefox firefox-nightly loader-error microsoft microsoft edge pre-1803 regression release-channel software compatibility windows 10 windows lifecycle
    • Replies: 0
    • Forum: Windows News