Extension manager in linux empty

I have this problem in my linux machine only, no problem in Windows and MacOS. Extension manager is completely empty. Restore extensions however, works fine. I have tried reinstalling from scratch, so no problem of old configurations.

Hello, I have the same issue on Manjaro Linux both with the last stable and nightly releases. Have you resolved this?

Same observation on Arch Linux : extension list is empty, restoring extensions works, with 4.13.0-2022-03-19 r30735 / acc6180.

No solution so far, I have to download the extensions manually, or restore them if I have them installed previously

Thank for the replies, so the easiest workaround is to download plugins and add them manually. For the reference, the website is e.g. https://extensions.slicer.org/catalog/All/29738/linux , where 29738 is a compilation number of the last stable release (Slicer → Help → About Slicer → 4.11.20210226 r29738 / 7a593c8)

The problem is related with the qSlicerWebWidget: Install extensions is empty · Issue #6293 · Slicer/Slicer · GitHub

Not sure yet if the error is in the Slicer side or an extra configuration is missing in Archlinux.

I can reproduce with pyqt5, no Slicer, so it seems Arch related. I will keep exploring.

Bufff, workarounded using:

QTWEBENGINE_DISABLE_SANDBOX=1 ./Slicer

I am guessing this is not he best solution though.

For debugging, using these flags helped:

QTWEBENGINE_CHROMIUM_FLAGS="--enable-logging --log-level=0 --v=1" ./Slicer 

By the way, these are the warnings generated during loading:

Remote debugging server started successfully. Try pointing a Chromium-based browser to http://127.0.0.1:1337
"" 1 "JQuery not loaded - Failed to trigger webkitvisibilitychange"
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.example.com/Slicer/Extensions/BreastImplantAnalyzer.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.example.com/Slicer/Extensions/BreastImplantAnalyzer.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/b/bc/BaselineFollowupSCANRegisteredCMFreg2.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/b/bc/BaselineFollowupSCANRegisteredCMFreg2.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/2/2a/CarreraSliceEffect.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/2/2a/CarreraSliceEffect.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/b/b9/ChangeTracker_logo.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/b/b9/ChangeTracker_logo.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.example.com/Slicer/Extensions/CleverSeg.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.example.com/Slicer/Extensions/CleverSeg.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/e/e1/CornerAnnotationIcon.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/e/e1/CornerAnnotationIcon.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/b/b7/CurveMakerIcon.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/b/b7/CurveMakerIcon.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://slicer.org/slicerWiki/images/9/92/DSC_logo_Resized.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://slicer.org/slicerWiki/images/9/92/DSC_logo_Resized.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/a/ac/ErodeDilateLabelIcon.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/a/ac/ErodeDilateLabelIcon.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/1/16/FilmDosimetry_Logo_128x128.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/1/16/FilmDosimetry_Logo_128x128.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/f/f1/GelDosimetry_Logo_128x128.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/f/f1/GelDosimetry_Logo_128x128.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/a/a7/GyroGuide.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/a/a7/GyroGuide.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/e/e5/QuickToolsLogo.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/e/e5/QuickToolsLogo.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/e/e8/MatlabBridgeLogo.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/e/e8/MatlabBridgeLogo.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/index.php/File:ModelClipIcon.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/index.php/File:ModelClipIcon.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://slicer.org/slicerWiki/images/4/43/Slicer4ExtensionModelToModelDistance.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://slicer.org/slicerWiki/images/4/43/Slicer4ExtensionModelToModelDistance.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/2/2e/OpenCAD.PNG'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/2/2e/OpenCAD.PNG'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/a/ac/PAAlogo-small.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/a/ac/PAAlogo-small.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/2/21/PerkTutorLogo.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/2/21/PerkTutorLogo.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/b/b1/DPetBrainQuantification.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/b/b1/DPetBrainQuantification.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/a/a7/Portplacement_icon.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/a/a7/Portplacement_icon.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/d/d6/ResectionPlannerLogo.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/d/d6/ResectionPlannerLogo.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://viewvc.slicer.org/viewvc.cgi/Slicer4/trunk/Extensions/Testing/SNRMeasurement/SNRMeasurement.png?revision=21745&view=co'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://viewvc.slicer.org/viewvc.cgi/Slicer4/trunk/Extensions/Testing/SNRMeasurement/SNRMeasurement.png?revision=21745&view=co'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.na-mic.org/Wiki/images/a/ad/Spharm-pdm-icon.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.na-mic.org/Wiki/images/a/ad/Spharm-pdm-icon.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/b/ba/SegAidedRegSquareFocus128.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/b/ba/SegAidedRegSquareFocus128.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/f/f2/SkullStripper.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/f/f2/SkullStripper.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://raw.githubusercontent.com/SlicerDMRI/slicerdmri.github.io/master/images/DMRI_3D_SLICER-icon.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://raw.githubusercontent.com/SlicerDMRI/slicerdmri.github.io/master/images/DMRI_3D_SLICER-icon.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://raw.githubusercontent.com/QIICR/SlicerDevelopmentToolbox/master/Resources/Icons/SlicerDevelopmentToolbox.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://raw.githubusercontent.com/QIICR/SlicerDevelopmentToolbox/master/Resources/Icons/SlicerDevelopmentToolbox.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/f/ff/SlicerHeart_Logo_128x128.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/f/ff/SlicerHeart_Logo_128x128.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/2/2b/SlicerIGTLogo.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/2/2b/SlicerIGTLogo.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/8/87/SlicerProstate_Logo_1.0_128x128.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/8/87/SlicerProstate_Logo_1.0_128x128.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/2/29/SlicerRT_Logo_3.0_128x128.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/2/29/SlicerRT_Logo_3.0_128x128.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/6/64/SlicerToKiwiExporterLogo.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/6/64/SlicerToKiwiExporterLogo.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.nitrc.org/project/screenshot.php?group_id=196&screenshot_id=269'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.nitrc.org/project/screenshot.php?group_id=196&screenshot_id=269'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/c/cd/SwissSkullStripper.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/c/cd/SwissSkullStripper.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://slicer.org/slicerWiki/images/3/32/T1_Mapping_Logo_Resized.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://slicer.org/slicerWiki/images/3/32/T1_Mapping_Logo_Resized.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/9/92/TCIABrowser_logo.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/9/92/TCIABrowser_logo.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/c/c2/VolumeClipLogo.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30746/linux' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/slicerWiki/images/c/c2/VolumeClipLogo.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30746/linux" 0 "A cookie associated with a cross-site resource at http://www.nitrc.org/ was set without the `SameSite` attribute. A future release of Chrome will only deliver cookies with cross-site requests if they are set with `SameSite=None` and `Secure`. You can review cookies in developer tools under Application>Storage>Cookies and see more details at https://www.chromestatus.com/feature/5088147346030592 and https://www.chromestatus.com/feature/5633521622188032."
A cookie associated with a cross-site resource at http://www.nitrc.org/ was set without the `SameSite` attribute. A future release of Chrome will only deliver cookies with cross-site requests if they are set with `SameSite=None` and `Secure`. You can review cookies in developer tools under Application>Storage>Cookies and see more details at https://www.chromestatus.com/feature/5088147346030592 and https://www.chromestatus.com/feature/5633521622188032.

This is does not look like a workaround but a solution if your linux kernel does not fulfill Chromium requirements - see Qt WebEngine Platform Notes | Qt WebEngine 5.15.8

I’ve submitted a pull request that adds this information to the documentation, please check:

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