The new pie-chart style of download progress indication in the toolbar button is currently set to show 5% as the initial (0%) visual state and for indeterminate (Content-Length unknown) downloads. This is still quite a thin sliver and hard to read. UX has suggested 10% as a better initial visual value.

https://hg.mozilla.org/mozilla-central/rev/83e4658ece22

After discussions with UX we' like this one uplifted please.

Comment on attachment 9220245 [details]
Bug 1709174 - Show a minimum of 10% filled in the download indicator progress meter. r?Jaws

Beta/Release Uplift Approval Request

• User impact if declined: Required for Proton / MR1, users will have trouble knowing that the download has started since the previous value was too small visually
• Is this code covered by automated tests?: No
• Has the fix been verified in Nightly?: No
• Needs manual test from QE?: No
• If yes, steps to reproduce:
• List of other uplifts needed: none
• Risk to taking this patch: Low
• Why is the change risky/not risky? (and alternatives if risky): Simple change of starting value from 5 to 10.
• String changes made/needed: none

Comment on attachment 9220245 [details]
Bug 1709174 - Show a minimum of 10% filled in the download indicator progress meter. r?Jaws

Low risk, approved for 89 beta 10, thanks.

https://hg.mozilla.org/releases/mozilla-beta/rev/74d9f2a87a1d

Verified that the pie chart starts at 10% on 89.0b10 and 90.0a1 (2021-05-10) instead of the 5% in 90.0a1 (2021-05-03). Tests were performed on macOS 10.15.7, Windows 10 and Ubuntu 20.04.