I had been using FF 52.9ESR till 6 months ago, when I copied the contents of my profile into Waterfox Classic and switched. I keep FF as my secondary browser, and keep places.sqlite updated.
I rely on favicons to get me more quickly through my 1800 bookmarks in 52 folders and who-knows how many subfolders. I recently copied my favicons.sqlite back to my FF profile, but nothing shows in the bookmarks. They've all gone back to default until I visit that particular page.
screenshot:
I had no problem with this when I left FF, and I've changed nothing in my profile except places.sqlite.
I rely on favicons to get me more quickly through my 1800 bookmarks in 52 folders and who-knows how many subfolders. I recently copied my favicons.sqlite back to my FF profile, but nothing shows in the bookmarks. They've all gone back to default until I visit that particular page.
screenshot:

I had no problem with this when I left FF, and I've changed nothing in my profile except places.sqlite.
My Computer
At a glance
Win 7 Ult 64-bitG620 2.6GHZ Pentium R6 GB
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- HP p6-2020t
- OS
- Win 7 Ult 64-bit
- CPU
- G620 2.6GHZ Pentium R
- Memory
- 6 GB
- Monitor(s) Displays
- 25" HPLV2311
- Screen Resolution
- 1920 x 1200
- Hard Drives
- 1 SATA, 1 exterior SATA
- Case
- HP
- Cooling
- PSU
- Antivirus
- Glasswire
- Browser
- Waterfox; Firefox; Chrome for work
- Other Info
- Firewall--Glasswire
Similar specs in Gateway DX4200
Verizon FIOS Wired network
1 other Win7 computer-- has SSD