The descriptive images from Screenshots tour page are no longer displayed on dev and stage

[SoftVision-CosminMuntean]

[Affected versions]:

• Nightly 59.0a1
• Screenshots 27.0.0 dev and stage

[Affected Platforms]:

• All Windows
• All Mac OS
• All Linux

[Steps to reproduce]:

1. Open the Firefox browser and navigate to "https://screenshots.stage.mozaws.net/#tour" page.
2. Observe the descriptive images from the page.

[Expected result]:

• The descriptive images are correctly displayed.

[Actual result]:

• The descriptive images are no longer displayed.

[Notes]:

• This issue is also reproducible on dev server.
• Here is a screenshot with the issue:
  

[chenba]

Probably related to #3897. Let's wait until PR #3910 is merged and re-test this.

[SoftVision-CosminMuntean]

I have retested this issue on Screenshots dev version and is no longer reproducible. It seems that was fixed after the PR #3910 was merged.