ext や script (こっちは update 通知が無くて管理が面倒いし)を増やすと遅くなって仕方が無いんだけど，こんな ext 発見したので入れてみた．
Better Gmail (Firefox extension)
既存の２５？以上の Greasemonkey script と skin のパッケージ(該当する Greasemonkey script は不要になるみたい)
- Add Google Calendar link：Adds GCal link to folder list. By Pau Tomas
- Add Google Reader "Feeds" link：Adds Feeds link to folder list. By Mihai Parparita
- Air Skin：A Gmail skin inspired by airways. By Bogdan Piloca
- All pages' mailto: links compose in Gmail：Adds compose message in Gmail link next to all email links. By Julien Couvreur, Gina Trapani
- Attachment Icons：Adds attachment filetype icons. By Moktoipas
- Attachment Icons (Bigger!)：Adds bigger attachment filetype icons. By Moktoipas
- Attachment Reminder：Reminds you to attach the file you mentioned. By norcimo
- Bottom Post in Reply：Inserts cursor after quoted text in reply (plain text only). By Henrik N
- Conversation Preview：Right-click message bubble previews in list view. By Mihai Parparita
- Date Search：Find all the messages for one single day. By Adam Pash
- Filter Assistant：Appends an easy filter creation button on a message. By Ming (Amos) Zhang
- Fixed Font：Use a fixed font for composing plain text messages. By Jb Evain
- Folders4Gmail：Lists labels in a folder-like hierarchy. By Arend v. Reinersdorff
- Force encrypted Gmail connection (https)：Forces encrypted https:// connection to Gmail. By Mark Pilgrim
- Forward Thread：Combines all messages and enters them into the forward box. By Aaron Boodman
- Hide Invites to Gmail：Hides the Invites box. By Geferson
- Hide Spam count：Hides Gmail's Spam message count. By Daniel Rozenberg
- Hide Labels：Hides the Labels box. By TigerJay
- Inbox Count First：See unread message count first on Gmail tab title. By Jon Ramsey, Gina Trapani
- Integrate Google Reader：Show GReader feeds below Gmail messages. By Winston, nickman55
- Label Colors：Optionally colors label names (with a #color suffix). By Mihai Parparita
- Macros keyboard shortcuts (press H for help) Adds keyboard shortcuts. Press h in Gmail for details. By Mihai Parparita, Brent Nef
- Mail.app：Mac-like skin. By Frank (DesertFox)
- One Click Conversations：See recent conversations with a certain contact. By Jeff Keen
- Revisited：Adds rollover highlights and enlarges buttons. By funkjedi
- Saved Searches (cookie)：Saves searches (in cookies, so per computer.) By Mihai Parparita
- Saved Searches (contact)：Saves searches (in a fake contact, so per account.) By Mihai Parparita, Luke Baker
- Show disk usage as progress bar：Display your disk usage as a bar. By TigerJay
- Signature Settings: Float/HTML/No dashes：Adds message signature options in Settings area. By Tim Jarrett
- Smart Read Button：Adds dynamic Mark as Read or Unread button. By Chenxin Li
- Super Clean：Skins Gmail with a clean, white look. By Ganesh Rao
- TinyURL selected link (Alt+Shift+U)：Shrink a URL with a key combination. (Alt+Shift+U) By Mark Wilkie
- Unlabeled Message Search：Adds a search for unlabeled messages. By Jaidev
どんだけぇー．
追記
Label Colors (Messages) と Revisited (Skins) は conflict してラベル色が無効になる(Skins は多分の他の項目でも)．
