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firefox window transparent, images videos and dark colors are transparent and show desktop background and desktop icons as see through #10133

Open prateekrajgautam opened 3 years ago

prateekrajgautam commented 3 years ago 
 * Cinnamon version (cinnamon --version)
   - Please specify if you are using the daily builds PPA
     (https://launchpad.net/~linuxmint-daily-build-team/+archive/ubuntu/daily-builds).
 * Distribution - (Mint 17.2, Arch, Fedora 25, etc...)
 * Graphics hardware *and* driver used
 * 32 or 64 bit
 * Attach ~/.xsession-errors, or /var/log/syslog

Issue firefox window transparent, images videos and dark colors are transparent and show desktop background and desktop icons as see through

Steps to reproduce I tried uninstalling reinstalling, deleting .mozilla config folder, even tried firefox-dev version nothing seems to solve.

I tried to run in safemode with /usr/bin/firefox –safe-mode so it gives two options resenting doesn't seems to work

I created new user account in same os and firefox works fine there with same graphics options.

Expected behaviour

Screenshot from 2021-06-05 22-06-14 Screenshot from 2021-06-05 14-06-15 Screenshot from 2021-06-05 14-05-33

Other information

{
  "application": {
    "name": "Firefox",
    "osVersion": "Linux 5.4.0-73-generic #82-Ubuntu SMP Wed Apr 14 17:39:42 UTC 2021",
    "version": "89.0",
    "buildID": "20210527174632",
    "distributionID": "mint",
    "userAgent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:89.0) Gecko/20100101 Firefox/89.0",
    "safeMode": true,
    "supportURL": "https://support.mozilla.org/1/firefox/89.0/Linux/en-US/",
    "numTotalWindows": 1,
    "numFissionWindows": 0,
    "numRemoteWindows": 1,
    "fissionAutoStart": false,
    "fissionDecisionStatus": "disabledBySafeMode",
    "remoteAutoStart": true,
    "policiesStatus": 0,
    "keyLocationServiceGoogleFound": true,
    "keySafebrowsingGoogleFound": true,
    "keyMozillaFound": false
  },
  "securitySoftware": {
    "registeredAntiVirus": "",
    "registeredAntiSpyware": "",
    "registeredFirewall": ""
  },
  "processes": {
    "remoteTypes": {
      "web": 1,
      "extension": 1,
      "privilegedabout": 1,
      "prealloc": 1
    },
    "maxWebContentProcesses": 8
  },
  "environmentVariables": {
    "DISPLAY": ":0",
    "MOZ_APP_LAUNCHER": "/usr/bin/firefox",
    "MOZ_ASSUME_USER_NS": "1",
    "MOZ_CRASHREPORTER_EVENTS_DIRECTORY": "/home/prateek/.mozilla/firefox/m8d1dcw8.default-release-1622921698486/crashes/events",
    "MOZ_CRASHREPORTER_RESTART_ARG_0": "/usr/bin/firefox",
    "MOZ_CRASHREPORTER_RESTART_ARG_1": "",
    "MOZ_CRASHREPORTER_DATA_DIRECTORY": "/home/prateek/.mozilla/firefox/Crash Reports",
    "MOZ_CRASHREPORTER_PING_DIRECTORY": "/home/prateek/.mozilla/firefox/Pending Pings",
    "MOZ_CRASHREPORTER_STRINGS_OVERRIDE": "/usr/lib/firefox/browser/crashreporter-override.ini",
    "MOZ_LAUNCHED_CHILD": "",
    "XRE_PROFILE_PATH": "",
    "XRE_PROFILE_LOCAL_PATH": "",
    "XRE_START_OFFLINE": "",
    "XRE_BINARY_PATH": "",
    "XRE_RESTARTED_BY_PROFILE_MANAGER": "",
    "MOZ_RESET_PROFILE_RESTART": "",
    "MOZ_APP_RESTART": "1",
    "MOZ_RESET_PROFILE_MIGRATE_SESSION": "",
    "MOZ_SAFE_MODE_RESTART": ""
  },
  "modifiedPreferences": {
    "browser.contentblocking.category": "standard",
    "browser.sessionstore.upgradeBackup.latestBuildID": "20210527174632",
    "browser.startup.homepage_override.buildID": "20210527174632",
    "browser.startup.homepage_override.mstone": "89.0",
    "browser.urlbar.placeholderName": "Yahoo!",
    "doh-rollout.balrog-migration-done": true,
    "doh-rollout.doneFirstRun": true,
    "dom.push.userAgentID": "2f8542ab4be24f5a9b7a92bf2992a397",
    "extensions.lastAppVersion": "89.0",
    "media.gmp.storage.version.observed": 1,
    "network.trr.blocklist_cleanup_done": true,
    "privacy.sanitize.pending": "[{\"id\":\"newtab-container\",\"itemsToClear\":[],\"options\":{}}]",
    "security.sandbox.content.tempDirSuffix": "3d977c29-c298-4897-abdc-d8bab94dd7a3"
  },
  "lockedPreferences": {
    "fission.autostart.session": false
  },
  "printingPreferences": {},
  "media": {
    "currentAudioBackend": "pulse-rust",
    "currentMaxAudioChannels": 2,
    "currentPreferredSampleRate": 48000,
    "audioOutputDevices": [
      {
        "name": "Built-in Audio Analog Stereo",
        "groupId": "/devices/pci0000:00/0000:00:1b.0/sound/card0",
        "vendor": "Intel Corporation",
        "type": 2,
        "state": 2,
        "preferred": 15,
        "supportedFormat": 12336,
        "defaultFormat": 16,
        "maxChannels": 2,
        "defaultRate": 48000,
        "maxRate": 384000,
        "minRate": 1,
        "maxLatency": 0,
        "minLatency": 0
      },
      {
        "name": "Built-in Audio Analog Stereo",
        "groupId": "/devices/platform/snd_aloop.0/sound/card1",
        "vendor": "",
        "type": 2,
        "state": 2,
        "preferred": 0,
        "supportedFormat": 12336,
        "defaultFormat": 16,
        "maxChannels": 2,
        "defaultRate": 44100,
        "maxRate": 384000,
        "minRate": 1,
        "maxLatency": 0,
        "minLatency": 0
      }
    ],
    "audioInputDevices": [
      {
        "name": "Monitor of Built-in Audio Analog Stereo",
        "groupId": "/devices/pci0000:00/0000:00:1b.0/sound/card0",
        "vendor": "Intel Corporation",
        "type": 1,
        "state": 2,
        "preferred": 0,
        "supportedFormat": 12336,
        "defaultFormat": 16,
        "maxChannels": 2,
        "defaultRate": 48000,
        "maxRate": 384000,
        "minRate": 1,
        "maxLatency": 0,
        "minLatency": 0
      },
      {
        "name": "Built-in Audio Analog Stereo",
        "groupId": "/devices/pci0000:00/0000:00:1b.0/sound/card0",
        "vendor": "Intel Corporation",
        "type": 1,
        "state": 2,
        "preferred": 0,
        "supportedFormat": 12336,
        "defaultFormat": 16,
        "maxChannels": 2,
        "defaultRate": 48000,
        "maxRate": 384000,
        "minRate": 1,
        "maxLatency": 0,
        "minLatency": 0
      },
      {
        "name": "Monitor of Built-in Audio Analog Stereo",
        "groupId": "/devices/platform/snd_aloop.0/sound/card1",
        "vendor": "",
        "type": 1,
        "state": 2,
        "preferred": 0,
        "supportedFormat": 12336,
        "defaultFormat": 16,
        "maxChannels": 2,
        "defaultRate": 44100,
        "maxRate": 384000,
        "minRate": 1,
        "maxLatency": 0,
        "minLatency": 0
      },
      {
        "name": "Built-in Audio Analog Stereo",
        "groupId": "/devices/platform/snd_aloop.0/sound/card1",
        "vendor": "",
        "type": 1,
        "state": 2,
        "preferred": 15,
        "supportedFormat": 12336,
        "defaultFormat": 16,
        "maxChannels": 2,
        "defaultRate": 44100,
        "maxRate": 384000,
        "minRate": 1,
        "maxLatency": 0,
        "minLatency": 0
      }
    ]
  },
  "accessibility": {
    "isActive": true,
    "forceDisabled": 0,
    "handlerUsed": false,
    "instantiator": ""
  },
  "startupCache": {
    "DiskCachePath": "/home/prateek/.cache/mozilla/firefox/m8d1dcw8.default-release-1622921698486/startupCache/startupCache.8.little",
    "IgnoreDiskCache": false,
    "FoundDiskCacheOnInit": false,
    "WroteToDiskCache": false
  },
  "libraryVersions": {
    "NSPR": {
      "minVersion": "4.30",
      "version": "4.30"
    },
    "NSS": {
      "minVersion": "3.64",
      "version": "3.64"
    },
    "NSSUTIL": {
      "minVersion": "3.64",
      "version": "3.64"
    },
    "NSSSSL": {
      "minVersion": "3.64",
      "version": "3.64"
    },
    "NSSSMIME": {
      "minVersion": "3.64",
      "version": "3.64"
    }
  },
  "userJS": {
    "exists": false
  },
  "intl": {
    "localeService": {
      "requested": [
        "en-IN"
      ],
      "available": [
        "en-US"
      ],
      "supported": [
        "en-US"
      ],
      "regionalPrefs": [
        "en-IN"
      ],
      "defaultLocale": "en-US"
    },
    "osPrefs": {
      "systemLocales": [
        "en-IN"
      ],
      "regionalPrefsLocales": [
        "en-IN"
      ]
    }
  },
  "crashes": {
    "submitted": [],
    "pending": 0
  },
  "sandbox": {
    "hasSeccompBPF": true,
    "hasSeccompTSync": true,
    "hasPrivilegedUserNamespaces": true,
    "hasUserNamespaces": true,
    "canSandboxContent": true,
    "canSandboxMedia": true,
    "syscallLog": [],
    "contentSandboxLevel": 4,
    "effectiveContentSandboxLevel": 4
  },
  "remoteAgent": {
    "listening": false,
    "url": ""
  },
  "graphics": {
    "numTotalWindows": 1,
    "numAcceleratedWindows": 0,
    "windowLayerManagerType": "Basic",
    "windowLayerManagerRemote": true,
    "windowUsingAdvancedLayers": false,
    "numAcceleratedWindowsMessage": {
      "key": ""
    },
    "adapterDescription": "GeForce GT 710/PCIe/SSE2",
    "adapterVendorID": "0x10de",
    "adapterDeviceID": "0x128b",
    "adapterRAM": 0,
    "adapterDrivers": "",
    "driverVendor": "nvidia/unknown",
    "driverVersion": "460.80.0.0",
    "driverDate": "",
    "adapterVendorID2": "",
    "adapterDeviceID2": "",
    "isGPU2Active": false,
    "usesTiling": false,
    "contentUsesTiling": false,
    "offMainThreadPaintEnabled": false,
    "offMainThreadPaintWorkerCount": 0,
    "targetFrameRate": 60,
    "windowProtocol": "x11",
    "desktopEnvironment": "cinnamon",
    "webgl1Renderer": "WebGL is currently disabled.",
    "webgl1Version": "-",
    "webgl1DriverExtensions": "-",
    "webgl1Extensions": "-",
    "webgl1WSIInfo": "-",
    "webgl2Renderer": "WebGL is currently disabled.",
    "webgl2Version": "-",
    "webgl2DriverExtensions": "-",
    "webgl2Extensions": "-",
    "webgl2WSIInfo": "-",
    "info": {
      "AzureCanvasBackend": "skia",
      "AzureFallbackCanvasBackend": "none",
      "AzureContentBackend": "skia",
      "CairoUseXRender": 0,
      "ApzWheelInput": 1,
      "ApzDragInput": 1,
      "ApzKeyboardInput": 1,
      "ApzAutoscrollInput": 1,
      "ApzZoomingInput": 1,
      "CMSOutputProfile": "Empty profile data",
      "DisplayCount": 1,
      "Display0": "1920x1080 default"
    },
    "featureLog": {
      "features": [
        {
          "name": "HW_COMPOSITING",
          "description": "Compositing",
          "status": "blocked",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "runtime",
              "status": "blocked",
              "message": "Acceleration blocked by safe-mode"
            }
          ]
        },
        {
          "name": "OPENGL_COMPOSITING",
          "description": "OpenGL Compositing",
          "status": "unavailable",
          "log": [
            {
              "type": "default",
              "status": "unavailable",
              "message": "Hardware compositing is disabled"
            }
          ]
        },
        {
          "name": "WEBRENDER",
          "description": "WebRender",
          "status": "unavailable-in-safe-mode",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "runtime",
              "status": "unavailable-in-safe-mode",
              "message": "Safe-mode is enabled"
            }
          ]
        },
        {
          "name": "WEBRENDER_QUALIFIED",
          "description": "WebRender qualified",
          "status": "available",
          "log": [
            {
              "type": "default",
              "status": "available"
            }
          ]
        },
        {
          "name": "WEBRENDER_COMPOSITOR",
          "description": "WebRender native compositor",
          "status": "disabled",
          "log": [
            {
              "type": "default",
              "status": "disabled",
              "message": "Disabled by default"
            }
          ]
        },
        {
          "name": "WEBRENDER_SHADER_CACHE",
          "description": "WebRender shader disk cache",
          "status": "unavailable",
          "log": [
            {
              "type": "default",
              "status": "disabled",
              "message": "Disabled by default"
            },
            {
              "type": "runtime",
              "status": "unavailable",
              "message": "WebRender disabled"
            }
          ]
        },
        {
          "name": "WEBRENDER_OPTIMIZED_SHADERS",
          "description": "WebRender optimized shaders",
          "status": "unavailable",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "runtime",
              "status": "unavailable",
              "message": "WebRender disabled"
            }
          ]
        },
        {
          "name": "WEBRENDER_ANGLE",
          "description": "WebRender ANGLE",
          "status": "unavailable",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "env",
              "status": "unavailable",
              "message": "OS not supported"
            }
          ]
        },
        {
          "name": "WEBRENDER_DCOMP_PRESENT",
          "description": "WebRender DirectComposition",
          "status": "unavailable",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "user",
              "status": "disabled",
              "message": "User disabled via pref"
            },
            {
              "type": "env",
              "status": "unavailable",
              "message": "Requires Windows 10 or later"
            },
            {
              "type": "runtime",
              "status": "unavailable",
              "message": "Requires ANGLE"
            }
          ]
        },
        {
          "name": "WEBRENDER_SOFTWARE",
          "description": "WebRender software fallback",
          "status": "unavailable-in-safe-mode",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "runtime",
              "status": "unavailable-in-safe-mode",
              "message": "Safe-mode is enabled"
            }
          ]
        },
        {
          "name": "OMTP",
          "description": "Off Main Thread Painting",
          "status": "blocked",
          "log": [
            {
              "type": "default",
              "status": "disabled",
              "message": "Disabled by default"
            },
            {
              "type": "runtime",
              "status": "blocked",
              "message": "OMTP blocked by safe-mode"
            }
          ]
        },
        {
          "name": "WEBGPU",
          "description": "WebGPU",
          "status": "unavailable-no-webrender",
          "log": [
            {
              "type": "default",
              "status": "disabled",
              "message": "Disabled by default"
            },
            {
              "type": "runtime",
              "status": "unavailable-no-webrender",
              "message": "WebGPU can't present without WebRender"
            }
          ]
        },
        {
          "name": "X11_EGL",
          "description": "X11 EGL",
          "status": "blocklisted",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "env",
              "status": "blocklisted",
              "message": "Blocklisted by gfxInfo"
            }
          ]
        },
        {
          "name": "DMABUF",
          "description": "DMABUF",
          "status": "unavailable",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "runtime",
              "status": "unavailable",
              "message": "Requires EGL"
            }
          ]
        }
      ],
      "fallbacks": []
    },
    "crashGuards": []
  },
  "experimentalFeatures": [
    [
      "experimental-features-abouthome-startup-cache",
      "browser.startup.homepage.abouthome_cache.enabled",
      false
    ],
    [
      "experimental-features-cookie-samesite-lax-by-default2",
      "network.cookie.sameSite.laxByDefault",
      false
    ],
    [
      "experimental-features-cookie-samesite-none-requires-secure2",
      "network.cookie.sameSite.noneRequiresSecure",
      false
    ],
    [
      "experimental-features-cookie-samesite-schemeful",
      "network.cookie.sameSite.schemeful",
      false
    ],
    [
      "experimental-features-css-constructable-stylesheets",
      "layout.css.constructable-stylesheets.enabled",
      false
    ],
    [
      "experimental-features-css-masonry2",
      "layout.css.grid-template-masonry-value.enabled",
      false
    ],
    [
      "experimental-features-devtools-color-scheme-simulation",
      "devtools.inspector.color-scheme-simulation.enabled",
      true
    ],
    [
      "experimental-features-devtools-compatibility-panel",
      "devtools.inspector.compatibility.enabled",
      false
    ],
    [
      "experimental-features-devtools-execution-context-selector",
      "devtools.webconsole.input.context",
      false
    ],
    [
      "experimental-features-devtools-serviceworker-debugger-support",
      "devtools.debugger.features.windowless-service-workers",
      false
    ],
    [
      "experimental-features-fission",
      "fission.autostart",
      false
    ],
    [
      "experimental-features-http3",
      "network.http.http3.enabled",
      true
    ],
    [
      "experimental-features-media-avif",
      "image.avif.enabled",
      false
    ],
    [
      "experimental-features-multi-pip",
      "media.videocontrols.picture-in-picture.allow-multiple",
      true
    ],
    [
      "experimental-features-ime-search",
      "browser.urlbar.keepPanelOpenDuringImeComposition",
      false
    ],
    [
      "experimental-features-web-api-inputmode",
      "dom.forms.inputmode",
      false
    ],
    [
      "experimental-features-web-gpu2",
      "dom.webgpu.enabled",
      false
    ],
    [
      "experimental-features-webrtc-global-mute-toggles",
      "privacy.webrtc.globalMuteToggles",
      false
    ]
  ],
  "addons": [
    {
      "name": "DuckDuckGo",
      "type": "extension",
      "version": "1.0",
      "isActive": true,
      "id": "duckduckgo@search.mozilla.org"
    },
    {
      "name": "Wikipedia (en)",
      "type": "extension",
      "version": "1.1",
      "isActive": true,
      "id": "wikipedia@search.mozilla.org"
    },
    {
      "name": "Yahoo!",
      "type": "extension",
      "version": "1.0",
      "isActive": true,
      "id": "yahoo-in@search.mozilla.org"
    }
  ],
  "features": [
    {
      "name": "DoH Roll-Out",
      "version": "2.0.0",
      "id": "doh-rollout@mozilla.org"
    },
    {
      "name": "Firefox Screenshots",
      "version": "39.0.1",
      "id": "screenshots@mozilla.org"
    },
    {
      "name": "Form Autofill",
      "version": "1.0.1",
      "id": "formautofill@mozilla.org"
    },
    {
      "name": "Picture-In-Picture",
      "version": "1.0.0",
      "id": "pictureinpicture@mozilla.org"
    },
    {
      "name": "Web Compatibility Interventions",
      "version": "22.2.0",
      "id": "webcompat@mozilla.org"
    },
    {
      "name": "WebCompat Reporter",
      "version": "1.4.2",
      "id": "webcompat-reporter@mozilla.org"
    }
  ],
  "normandy": {
    "addonStudies": [],
    "prefRollouts": [
      {
        "slug": "bug-1703186-rollout-http3-support-release-88-89",
        "state": "active",
        "preferences": [
          {
            "preferenceName": "network.http.http3.enabled",
            "value": true,
            "previousValue": false
          },
          {
            "preferenceName": "network.http.http3.enable_0rtt",
            "value": false,
            "previousValue": true
          }
        ],
        "enrollmentId": "a23b4f2b-9629-41a3-8dbd-223fefdfbcd9"
      }
    ],
    "prefStudies": []
  }
}

**Configuration info, if applicable**
If this bug report is related to an Applet, Desklet or Extension, please paste (or use a pastebin service) the offending extension's settings, if it has any.  You can obtain this by opening its configuration, clicking the 'hamburger' button in the upper-right corner of the window, and selecting "Export to a file". **Please be sure to review the contents and remove any personal data it may contain.**

```$ 
inxi -Fxz
System:
  Kernel: 5.4.0-73-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 
  Desktop: Cinnamon 4.8.6 Distro: Linux Mint 20.1 Ulyssa 
  base: Ubuntu 20.04 focal 
Machine:
  Type: Desktop System: Gigabyte product: N/A v: N/A serial: <filter> 
  Mobo: Gigabyte model: H61MS v: x.x serial: <filter> 
  UEFI: American Megatrends v: F2 date: 06/25/2013 
CPU:
  Topology: Dual Core model: Intel Core i3-3220 bits: 64 type: MT MCP 
  arch: Ivy Bridge rev: 9 L2 cache: 3072 KiB 
  flags: avx lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 26339 
  Speed: 1596 MHz min/max: 1600/3300 MHz Core speeds (MHz): 1: 1597 2: 1596 
  3: 1596 4: 1596 
Graphics:
  Device-1: NVIDIA GK208B [GeForce GT 710] vendor: ASUSTeK driver: nvidia 
  v: 460.80 bus ID: 01:00.0 
  Display: x11 server: X.Org 1.20.9 driver: nvidia 
  unloaded: fbdev,modesetting,nouveau,vesa resolution: 1920x1080~60Hz 
  OpenGL: renderer: GeForce GT 710/PCIe/SSE2 v: 4.6.0 NVIDIA 460.80 
  direct render: Yes 
Audio:
  Device-1: Intel 6 Series/C200 Series Family High Definition Audio 
  vendor: Gigabyte driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
  Device-2: NVIDIA GK208 HDMI/DP Audio vendor: ASUSTeK driver: snd_hda_intel 
  v: kernel bus ID: 01:00.1 
  Sound Server: ALSA v: k5.4.0-73-generic 
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: Gigabyte driver: r8169 v: kernel port: d000 bus ID: 03:00.0 
  IF: enp3s0 state: up speed: 100 Mbps duplex: full mac: <filter> 
  IF-ID-1: docker0 state: down mac: <filter> 
Drives:
  Local Storage: total: 1.86 TiB used: 1.17 TiB (63.3%) 
  ID-1: /dev/sda vendor: Western Digital model: WDS240G2G0A-00JH30 
  size: 223.57 GiB 
  ID-2: /dev/sdb vendor: Western Digital model: WD10EARS-00Y5B1 
  size: 931.51 GiB 
  ID-3: /dev/sdc vendor: Western Digital model: WDS500G2B0A-00SM50 
  size: 465.76 GiB 
  ID-4: /dev/sdd type: USB model: NORELSYS 106X size: 223.57 GiB 
  ID-5: /dev/sde type: USB vendor: SanDisk model: Ultra size: 57.28 GiB 
Partition:
  ID-1: / size: 203.58 GiB used: 190.01 GiB (93.3%) fs: ext4 dev: /dev/sda6 
  ID-2: swap-1 size: 15.26 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda5 
Sensors:
  System Temperatures: cpu: 42.0 C mobo: N/A gpu: nvidia temp: 55 C 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 316 Uptime: 1h 08m Memory: 15.60 GiB used: 3.17 GiB (20.3%) 
  Init: systemd runlevel: 5 Compilers: gcc: 9.3.0 clang: 10.0.0-4ubuntu1 
  Shell: bash v: 5.0.17 inxi: 3.0.38
anti-mony commented 3 years ago

Try disabling hardware-acceleration. Doing that fixed this for me.

goebbe commented 2 years ago

Try disabling hardware-acceleration. Doing that fixed this for me.

It seems that there is no obvious way to disable hardware-acceleration via gfx.webrender in Firefox, starting from Firefox 93. The options to gfx.webrender.force.disabled and gfx.webrender.force-legacy-layers have been removed from about:config.