I found the solution I no longer remembered.
Through “adb shell”, execute the two following commands:
– su
– rm -r
'data/local/storage/persistent/1041+f+app+++
verticalhome.gaiamobile.org/idb'
→ Then exit “adb shell” and restart the device.
Source:
https://bugzilla.mozilla.org/show_bug.cgi?id=1143526#c17
Notes:
– It is possible that icons which were present at the first start of
Firefox OS and which you deleted since, reappear (smart collections for
example). You can delete them again if you wish.
– The comment of the webpage I selected mentions a file named
“444928743bpopoakbmeawr.ktss_es.sqlite”. Any file which has a name
beginning with “444928743bpopoakbmeawr.ktss_es” may contain your
bookmarks, so do not try to delete these files.