With Firefox 77.0.1, I made three attempts to update from 1.3.2
The first, in normal mode with 625 tabs but only around four loaded, seemed to bring the operating system to its knees. Eventually Firefox was killed:
swap_pager: out of swap space
swp_pager_getswapspace(22): failed
swp_pager_getswapspace(29): failed
swp_pager_getswapspace(31): failed
swp_pager_getswapspace(19): failed
swp_pager_getswapspace(29): failed
swap_pager: out of swap space
swp_pager_getswapspace(30): failed
pid 77485 (firefox), jid 0, uid 1002, was killed: out of swap space
pid 77407 (firefox), jid 0, uid 1002, was killed: out of swap space
Maybe coincidence; I had updated five other extensions (nothing unusual) prior to the attempt to update Canonical URL Detector.
Second and third attempts, in safe mode, failed.
I removed 1.3.2 then attempted to install 2.1.2:
Installation aborted because the add-on appears to be corrupt.
With Firefox 77.0.1, I made three attempts to update from 1.3.2
The first, in normal mode with 625 tabs but only around four loaded, seemed to bring the operating system to its knees. Eventually Firefox was killed:
Maybe coincidence; I had updated five other extensions (nothing unusual) prior to the attempt to update Canonical URL Detector.
Second and third attempts, in safe mode, failed.
I removed 1.3.2 then attempted to install 2.1.2: