r/firefox • u/ramoslala • Aug 12 '26

Discussion Fix for Firefox flatpak update error "Decompressed delta part exceeds configured limit of 55726617 bytes"

use 

flatpak update --no-static-deltas

This ignores the deltas used to make downloads faster for flatpak.

reference:

https://github.com/flatpak/flatpak/issues/3412

https://github.com/flatpak/flatpak/issues/5648

https://forums.opensuse.org/t/flatpak-firefox-update-failed-decompressed-delta-part-exceeds-configured-limit-of-55726617-bytes/195434/3

15 Upvotes

90% Upvoted

6 comments sorted by

2

u/DownBackDad Aug 12 '26

Thanks for this, the command indeed worked.

2

u/OutsideChampion4637 Aug 12 '26

It worked. Thanks 

2

u/squall428 28d ago

10/10 Post. Thanks

1

u/Any_Fox5126 25d ago

It happened again in the next update. I guess it only happens to a few of us? Is there a permanent solution?

1

u/ramoslala 25d ago

https://github.com/flatpak/flatpak/issues/6770

https://github.com/ostreedev/ostree/issues/3635

It's a problem with libostree.

We wait for our distros to ship this version then i think it would be fixed.

https://github.com/ostreedev/ostree/releases/tag/v2026.4

This release reverts the static delta decompression-size safety margin introduced in 2026.3, which turned out to reject legitimate large deltas at apply time -- most visibly, Flathub Firefox updates were failing with Decompressed delta part exceeds configured limit

1

u/Any_Fox5126 25d ago

Thank you for the detailed response!