We found 4 issueson slack.comworth fixing.
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We navigate your site the way customers would. Idle time is skipped.
The accessibility page shifts content during load
On /accessibility at desktop width, content moves under the reader while the page finishes loading. Cumulative layout shift measures 0.305, above the 0.25 boundary Google classes as poor, and the largest shift is attributed to the hero content container div.o-content-container.o-hero__content. The measurement was taken before any scrolling or clicking, and the same value came back on a fresh load.
Try it: Open /accessibility on desktop with a cold cache and DevTools Performance or the web-vitals CLS overlay recording, then reload and watch the hero block jump as late assets land.
Three security response headers are missing on the homepage
The response from https://slack.com/ is missing Content-Security-Policy, X-Content-Type-Options: nosniff, and Cross-Origin-Resource-Policy.
Try it: Run curl -sI https://slack.com/ and check the response for Content-Security-Policy, X-Content-Type-Options, and Cross-Origin-Resource-Policy.
The chat launcher covers policy body text on mobile
On /acceptable-use-policy at a 390px wide viewport, the circular purple chat launcher is painted over the paragraph that begins "The AUP may change as Slack grow". The button covers the end of that line and the middle of the following line, so "check back regul... or" is unreadable. The launcher sits inline with the text column rather than clear of it, and the occlusion is present on a fresh load of the page at the initial scroll position.
Try it: Open /acceptable-use-policy on a phone or a 390px wide window and read the paragraph just below the "Acceptable Use Policy" link; the chat launcher covers two lines of it.
The chat launcher covers text on the About page
On /about at a 390px wide viewport, the circular chat launcher sits on top of the body copy and covers part of the line "Slack was acquired by Salesforce in ...", so the digits of the year are hidden behind the purple button. The launcher is anchored over the text column rather than clear of it, and the same overlap appears at the same spot on repeat loads. The rest of the paragraph renders normally, so only the characters under the button are lost.
Try it: Open /about on a phone or a 390px wide window and look at the line "Slack was acquired by Salesforce in ..." near the chat launcher button.
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