At this point,“check for updates” functionality of the extension manager in 5.0.2 stable is problematic. It doesn’t find the updates… There are a lot of warnings about https, but I don’t see an actual error:
"https://extensions.slicer.org/catalog/All/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/f/f6/IntensitySegmenterIcon.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/f/f6/IntensitySegmenterIcon.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/3/34/PkModeling.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' was loaded over HTTPS, but requested an insecure image 'http://wiki.slicer.org/slicerWiki/images/3/34/PkModeling.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/w/images/6/6b/RadiomicsExtension.png'. This content should also be served over HTTPS."
Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' was loaded over HTTPS, but requested an insecure image 'http://www.slicer.org/w/images/6/6b/RadiomicsExtension.png'. This content should also be served over HTTPS.
"https://extensions.slicer.org/catalog/All/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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/30822/win" 0 "Mixed Content: The page at 'https://extensions.slicer.org/catalog/All/30822/win' 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/30822/win' 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.