Firefox 158
158.0.1
Release notes ↗
Is Firefox 158 still supported?
No
Firefox 158 reached end of life on Oct 27, 2026 (yesterday). It no longer gets updates, including security fixes. Upgrade to Firefox 159 (latest 159.0), supported until Nov 10, 2026.
- Released
- Oct 13, 2026
- End of life
- Oct 27, 2026
yesterday - Latest version
- 158.0.1
Oct 20, 2026
Upgrade path
The recommended upgrade is Firefox 159, currently at 159.0 and supported until Nov 10, 2026.
Quick answers
- Is Firefox 158 still supported?
- No. Firefox 158 reached end of life on Oct 27, 2026 (yesterday). It no longer gets updates, including security fixes. Upgrade to Firefox 159 (latest 159.0), supported until Nov 10, 2026.
- When is Firefox 158 end of life?
- Firefox 158 reached end of life on Oct 27, 2026. It gets no more updates, including security fixes.
- What is the latest version of Firefox 158?
- The latest Firefox 158 release is 158.0.1, released on Oct 20, 2026.
- When was Firefox 158 released?
- Firefox 158 was released on Oct 13, 2026.
- What should I upgrade Firefox 158 to?
- The recommended upgrade is Firefox 159, currently at 159.0 and supported until Nov 10, 2026.
- How do I check which Firefox version I have?
- Run
firefox --version, then paste the result into the “Am I up to date?” box on this page.
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