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I am getting this issue while running a performance test.
The suggestions is to run it in incognito, but I am running it in incognito and still getting this issue.
It is still running the test and giving me a score, but it seems something is affecting.
There were issues affecting this run of Lighthouse: There may be stored data affecting loading performance in this location: IndexedDB. Audit this page in an incognito window to prevent those resources from affecting your scores.
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These are the Lighthouse score ranges: 0 to 49 (red): Poor. 50 to 89 (orange): Needs Improvement. 90 to 100 (green): Good.
Performance is judged on how quick it takes your webpage to load. Accessibility is judged by how accessible your website is. Especially for users who might require technology such as a screen reader or have difficulty with colors. Best Practices are judged by factors which will usually only be apparent to developers.
Best Practices Lighthouse analyzes whether HTTPS and HTTP/2 are used, checks to see whether resources come from secure sources and assesses the vulnerability of JavaScript libraries. Other best practices look at secure database connections and avoiding the use of non-secure commands, such as document.
Open your normal Chrome browser, click the menu button (three dots at the top right). Then go to More Tools > Extensions And that's it. Now when you open up the Incognito window, the Chrome Lighthouse extension is right there in your menu. And no Grammarly extension to slow it down….
Furthermore, even though Lighthouse can provide you a single overall Performance score, it might be more useful to think of your site performance as a distribution of scores, rather than a single number. See the introduction of User-Centric Performance Metrics to understand why. The Performance score is a weighted average of the metric scores.
In general, only metrics contribute to your Lighthouse Performance score, not the results of Opportunities or Diagnostics. That said, improving the opportunities and diagnostics likely improve the metric values, so there is an indirect relationship.
Now when you open up the Incognito window, the Chrome Lighthouse extension is right there in your menu. And no Grammarly extension to slow it down…. Here's some more information on the new Lighthouse tool if you're new to it:
i face the very same issue:
site data showed some amount of data in indexdb although indexdb itself appears empty when i investigate it by clicking the node. after clearing site data indexdb went to 0 ad everything appears cleared. the alert remains unchanged.
when running lighthouse in incognito mode the alert is not there, so that hint at least works fine on my machine.
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