Today I was at a friend's which I have convinced since a long time to use Pale Moon, but needs the italian language pack. Also he runs Windows (I am a Linux user and do not use any language pack). The screen displayed the prompt pop-up for a Pale Moon update, we intended to defer it but somehow the wrong button was hit and the update started (without any opportunity of profile backup which I was going to suggest him). After which it said "IT language pack could not be installed because it is not compatible with Pale Moon x.y.z".
I tried a manual download of the language pack, some fiddlling with about:config per https://addons.palemoon.org/addon/pm-langpack-it/
, removing the old disabled language pack, with no avail. Only then, looking at the update log I realized that ...
- his original version was a 29.something (last update in February 29.4.4 ?)
- the upgrade offered today by the popup (and performed) was to 31.1.0 which is not the latest
- the language pack version is 31.4.1
So I did a "check for updates", this triggered a further update to 31.4.1, after which I could install the language pack.
So everything solved, but I have a curiosity ... why was he offered an upgrade from 29 to 31.1.0 and not directly to 31.4.1 ? Was it a protection against some intermediate change ?
The reasonable man adapts himself to the world: the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. (G.B. Shaw)