SEO improvements

[Pomax]

1. hreflang x-default should probably point to /en/ rather than / -> SEO | hreflang="x-default" should probably point to /en/ rather than / #8834
2. add a crawl-delay to robots.txt -> SEO | Add a crawl-delay to robots.txt #8835
3. why is the _util URL visible to non-CMS-authed users (can we add this to deny) -> SEO | Only show _util URL visible to CMS-authed users #8836
4. sitemap URL looks to point to a lot of 4xx pages? -> SEO | Sitemap URL to points to a lot of 4xx pages? #8837
5. sitemap
   • reports of localized PNI categories under the /en/ locale, which should not be happening. -> SEO | Sitemap shows localized PNI categories under the /en/ locale #8838
   • may be impairing site checks, see Investigate and potentially fix sitemap.xml #8162
6. put the "Mozilla Foundation" prefix in <title> at the end of the title -> SEO | Put "Mozilla Foundation" at the end of the <title> #8839
7. blog and categories: adding summary text to each card would make for a better page -> Blog improvements are in the works [Blog] - Blog Updates #8682
8. make sure that images use alt text -> [Accessibility] Images should have alt or aria-role #8840
9. make sure that images without alt text that shouldn't have alt text, have an aria-role that helps? -> [Accessibility] Images should have alt or aria-role #8840
10. finish making CMS temp redirects permanent redirects where possible -> SEO | Make CMS temp redirects permanent redirects where possible #8841
11. the django internationalisation jsl18n script is apparently (a) not minified, and (b) causing 404s? -> SEO | Ensure the Django internationalisation jsl18n script is minified and loads properly #8842

[tbrlpld]

I have created individual tickets in the SEO epic #8441 for the above points.

[tbrlpld]

I believe we can close this issue.

[tbrlpld]

I believe we can close this issue.