Can you use mozregression to find the responsible commit? Thanks.

Are that real check boxes or actually images and the check boxes are handled via JavaScript (i.e. replace the empty box image with a checked box image) ?

Can you post a link to a publicly accessible page (i.e. no authentication or signing on required)?

Try disabling Tracking Protection for the site.

Are that real check boxes or actually images and the check boxes are handled via JavaScript (i.e. replace the empty box image with a checked box image) ? Can you post a link to a publicly accessible page (i.e. no authentication or signing on required)?

I cant because its a control website for the backend

Are there errors reported in the Web Console ? Can you post the HTML code of those check boxes ?

You can right-click and select "Inspect" to open the built-in Inspector with this element selected.

• https://firefox-source-docs.mozilla.org/devtools-user/page_inspector/how_to/open_the_inspector/
• https://firefox-source-docs.mozilla.org/devtools-user/page_inspector/how_to/examine_and_edit_html/