[GH-ISSUE #167] Gmail slow, laggy, glitchy when using this list in UBO #99

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opened 2026-08-06 02:13:00 -04:00 by saavagebueno · 1 comment
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Originally created by @cryingismanly on GitHub (May 20, 2025).
Original GitHub issue: https://github.com/laylavish/uBlockOrigin-HUGE-AI-Blocklist/issues/167

  • Windows 11 Pro 23H2 (22631.5335) 64-bit
  • Firefox 138.0.4 (64-bit)
  • All built-in UBO lists enabled (except the 38 language/region ones)
  • No other custom UBO lists in use
  • Other extensions in use: Lastpass, Unhook for YouTube

Everything in Gmail is slow after adding this AI blocklist: initial load, scrolling, switching sections (Inbox/Trash/Sent/etc), composing emails, To/CC address autofill, etc.

Any idea what's causing this? At the moment it's unusable if it's going to break Gmail.

Thank you :)

Originally created by @cryingismanly on GitHub (May 20, 2025). Original GitHub issue: https://github.com/laylavish/uBlockOrigin-HUGE-AI-Blocklist/issues/167 - Windows 11 Pro 23H2 (22631.5335) 64-bit - Firefox 138.0.4 (64-bit) - All built-in UBO lists enabled (except the 38 language/region ones) - No other custom UBO lists in use - Other extensions in use: Lastpass, Unhook for YouTube Everything in Gmail is slow after adding this AI blocklist: initial load, scrolling, switching sections (Inbox/Trash/Sent/etc), composing emails, To/CC address autofill, etc. Any idea what's causing this? At the moment it's unusable if it's going to break Gmail. Thank you :)
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@realAzazello commented on GitHub (Jul 19, 2025):

Try using instead the noai_hosts.txt version in uBO, as noted in https://github.com/laylavish/uBlockOrigin-HUGE-AI-Blocklist/issues/163 -- it doesn't have the customized exceptions but it'll certainly invoke faster.

<!-- gh-comment-id:3092484417 --> @realAzazello commented on GitHub (Jul 19, 2025): Try using instead the `noai_hosts.txt` version in uBO, as noted in https://github.com/laylavish/uBlockOrigin-HUGE-AI-Blocklist/issues/163 -- it doesn't have the customized exceptions but it'll certainly invoke faster.
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Reference: DYNR/uBlockOrigin-HUGE-AI-Blocklist#99