the 'More extensions by …' card should show a red alert wherever an add-on will be incompatible with Firefox Quantum

[grahamperrin]

Issue

For users of ESR 52.x and 56.x, in some cases the card shows a mixture of legacy and non-legacy add-ons:

• with no hint of incompatibility with Firefox Quantum.

Example

Image source: https://addons.mozilla.org/addon/user-agent-switcher-firefox/ viewed with 56.0.2 on FreeBSD-CURRENT.

Enhancement request

Show an alert. Currently used in other situations:

• a red 'no entry' icon.

Show the alert – that small icon – without requiring the user to point or hover.

If the add-on will require a restart: no need to also show the yellow alert – an overarching single red alert should suffice.

Suggested milestone

• 2017-11-23
• https://github.com/mozilla/addons-frontend/milestone/80

Related

"More extensions by author_name" section has layout issues · Issue mozilla/addons#10901 · mozilla/addons-frontend

• not yet milestoned (and I don't imagine any urgency).

Background

From mozilla/addons-frontend#3807 (comment) (2017-11-06) under Not compatible with Firefox Quantum by willdurand · Pull Request …:

… It'll be nice to also have the icon in listings e.g. as shown in the shots at #11108

A little later:

I'm in two minds about that. One mind:

• discourage unnecessary clicks.

Second mind:

• serendipitous discovery of 'More extensions by …' the same developer

– and the more can be a very good thing, and 👍 it is already disclosed (without a Show more click) in the primary page for an add-on.

---

Unless I'm missing something (I'm speeding through screenshots, not code), we do not yet have:

• the no entry icon (Not compatible with Firefox Quantum) in the More extensions by … area:

…

[jvillalobos]

I don't think we should be showing the "not compatible" messaging beyond the listing pages. In a couple of weeks most users will either be using Quantum (in which case they will only see Quantum-compatible add-ons on AMO) or ESR (in which case they will probably stick with ESR and legacy add-ons for the next ~8 months). This clutters the UI and gives little benefit to users, who can click through and see the warning in the listing page anyway.