Text lags on input and displays incorrectly on Seek website on Firefox browser

[James Ray]

This is a video that demonstrates the problem: https://youtu.be/9ukXfcfszeY.

After refreshing the page the problem did not continue to occur.

I just installed Ubuntu yesterday on a new high-end, custom-built desktop, after having issues with using a couple of Manjaro desktop environments. Just now, while typing in this field, there were a few lags, but the text still displays correctly.

```
jray@fm:~$ inxi -Fxz
System: Host: fm Kernel: 4.15.0-48-generic x86_64 bits: 64 gcc: 7.3.0
           Desktop: Gnome 3.28.3 (Gtk 3.22.30-1ubuntu3)
           Distro: Ubuntu 18.04.2 LTS
Machine: Device: desktop Mobo: ASUSTeK model: TUF B450M-PLUS GAMING v: Rev X.0x serial: N/A
           UEFI: American Megatrends v: 1002 date: 03/07/2019
CPU: 8 core AMD Ryzen 7 2700X Eight-Core (-MT-MCP-)
           arch: Zen rev.2 cache: 4096 KB

           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm) bmips: 59085
           clock speeds: max: 3700 MHz 1: 1890 MHz 2: 1886 MHz 3: 1887 MHz
           4: 1889 MHz 5: 1888 MHz 6: 2037 MHz 7: 1883 MHz 8: 2185 MHz
           9: 1890 MHz 10: 1886 MHz 11: 1880 MHz 12: 1884 MHz 13: 1890 MHz
           14: 2176 MHz 15: 2042 MHz 16: 2194 MHz
Graphics: Card: NVIDIA Device 1e82 bus-ID: 07:00.0
           Display Server: x11 (X.Org 1.19.6 )
           drivers: fbdev,nouveau (unloaded: modesetting,vesa)
           Resolution: 1024x768@76.00hz
           OpenGL: renderer: llvmpipe (LLVM 7.0, 128 bits)
           version: 3.3 Mesa 18.2.8 Direct Render: Yes
Audio: Card-1 Advanced Micro Devices [AMD] Family 17h (Models 00h-0fh) HD Audio Controller
           driver: snd_hda_intel bus-ID: 09:00.3
           Card-2 NVIDIA Device 10f8 driver: snd_hda_intel bus-ID: 07:00.1
           Sound: Advanced Linux Sound Architecture v: k4.15.0-48-generic
Network: Card: Realtek RTL8111/8168/8411 PCIE Gigabit Ethernet Controller
           driver: r8169 v: 2.3LK-NAPI port: f000 bus-ID: 05:00.0
           IF: enp5s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives: HDD Total Size: 500.1GB (14.3% used)
           ID-1: /dev/nvme0n1 model: Samsung_SSD_970_EVO_Plus_500GB size: 500.1GB

Partition: ID-1: / size: 395G used: 5.7G (2%) fs: ext4 dev: /dev/dm-0
           ID-2: swap-1 size: 68.65GB used: 0.00GB (0%)
           fs: swap dev: /dev/dm-1
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 27.8C mobo: N/A
           Fan Speeds (in rpm): cpu: 0
Info: Processes: 380 Uptime: 1:01 Memory: 3488.5/64419.5MB
           Init: systemd runlevel: 5 Gcc sys: N/A
           Client: Shell (bash 4.4.191) inxi: 2.3.56
```

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: firefox 66.0.3+build1-0ubuntu0.18.04.1
ProcVersionSignature: Ubuntu 4.15.0-48.51-generic 4.15.18
Uname: Linux 4.15.0-48-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: jray 1819 F.... pulseaudio
 /dev/snd/controlC1: jray 1819 F.... pulseaudio
BuildID: 20190410105841
Channel: Unavailable
CurrentDesktop: ubuntu:GNOME
Date: Mon May 6 11:32:46 2019
ExecutablePath: /usr/lib/firefox/firefox
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
InstallationDate: Installed on 2019-05-05 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
IpRoute:
 default via 192.168.0.1 dev enp5s0 proto dhcp metric 100
 169.254.0.0/16 dev enp5s0 scope link metric 1000
 192.168.0.0/24 dev enp5s0 proto kernel scope link src 192.168.0.3 metric 100
Locales: extensions.sqlite corrupt or missing
PrefSources: prefs.js
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=66.0.3/20190410105841 (In use)
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: Upgraded to bionic on 2019-05-06 (0 days ago)
dmi.bios.date: 03/07/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1002
dmi.board.asset.tag: Default string
dmi.board.name: TUF B450M-PLUS GAMING
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1002:bd03/07/2019:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnTUFB450M-PLUSGAMING:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[James Ray (jamesray1)]

This is now a near-constant issue and occurs on multiple apps:
https://youtu.be/B1CYcDVZlrA
https://www.youtube.com/watch?v=EdF7EnLthxc

The zoom is too far in, while large-text is off in universal access and there is only one resolution for the monitor. The dock would often not pop up when hovering over it with auto-hide on.

I am going to move back to Manjaro or another OS.