# New Firefox 1.5 incompatible

**URL:** <https://forum.kirupa.com/t/new-firefox-1-5-incompatible/177458>\
**Category:** random\
**Created:** [February 2, 2006, 2:37am UTC](https://forum.kirupa.com/t/new-firefox-1-5-incompatible/177458 "2006-02-02T02:37:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![NeoDreamer](https://avatars.discourse-cdn.com/v4/letter/n/ccd318/32.png) [@NeoDreamer](https://forum.kirupa.com/u/NeoDreamer)\
**Post date:** [February 2, 2006, 2:37am UTC](https://forum.kirupa.com/t/new-firefox-1-5-incompatible/177458/1 "2006-02-02T02:37:17Z")

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I installed the newest Firefox, 1.5 and found out that my calendar extension is not compatible with it. So I had to reinstall 1.0. I can’t even find 1.0.7 to install.