User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0 [Affected OS-es] - Windows 10 - Ubuntu 16.04 - Mac OS 10.13.6 [Affected Fx Version] - Nightly (65.0a1 / 20181102100039) [Not Affected Fx Version] - DevEdition build (64.0b6/20181101155334) STR: 1. Launch Firefox and navigate to https://developer.mozilla.org/en-US/docs/Web/CSS/flex-shrink 2. Enable the element inspector. 3. Select the <div> with flex-shrink: 2 from <div class "example-container"> 4. Navigate to the Flexbox Inspector section and observe the minimap of the Flex Item. 5. Now change the Flex Item sizing info display by selecting a different flex item of the container, and then go back to the initial flex item and observe the mini-map again. 6. Repeat step 5 and observe the mini-map of the flex item set to shrink again. [AR] The display of the mini-map of a flex-item set to shrink with value=2 is inconsistent. I could not reproduce this with 0 or 1 values set for flex-shrink. I've attached a screenshot of the different displays and a short video for better understanding. [ER] The mini-map of any flex items set to shrink remains consistent while user changes views, if the properties of that specific item are not altered

I think this was fixed by bug 1504859. I can't reproduce the problem anymore and looking at the video and STRs, I'm fairly certain the fix I made in bug 1504859 will have taken care of this issue too. Feel free to re-open if it still occurs for you.