Simplified Plugin for Better Favicon Support + Caching

[DamianB-BitFlipper]

The plugin provided a good basis, but was not working well recently.

The favicon providers shipped with this plugin either stopped working or changed their API status. There was also a lot of overcomplication in this plugin (like choosing a random color for the circles).

I simplified the plugin and changed the favicon providers to actively maintained ones.

In order, tries to resolve:

https://twenty-icons.com/ on the full domain
https://twenty-icons.com/ on the root domain
https://favicon.vemetric.com/ on the full domain
https://favicon.vemetric.com/ on the root domain
https://cdn.favicon0.com/ on the full domain
https://cdn.favicon0.com/ on the root domain

Also to avoid unnecessary favicon GET requests, this plugin caches favicons in an LRU cache (maxSize 4096). If a favicon is requested that is in the cache, the data is used directly rather than hitting the network.

---

I installed this plugin locally on my mailspring and it works like a charm!

[Striffly]

Thank you for your contribution ! I will test it in mid-January

[technobulb]

Thanks! Just tried it and I seem to be getting all blank icons. Any ideas?

[DamianB-BitFlipper]

What do the console logs say. Open up dev tools inspect where you can see them.

[technobulb]

C:\Users\user\AppDa…\error-logger.js:99 Error: Cannot find module 'C:\Users\user\AppData\Roaming\Mailspring\packages\mailspring-avatars\lib\main'
Require stack:
- C:\Users\user\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\package.js
- C:\Users\user\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\package-manager.js
- C:\Users\user\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\app-env.js
- C:\Users\user\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\window-bootstrap.js
- C:\Users\user\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\static\index.html
    at Package.activate (/C:/Users/appveyor/A…rc/package.ts:46:22)
    at PackageManager.activatePackage (/C:/Users/appveyor/A…ge-manager.ts:129:9)
    at /C:/Users/appveyor/A…ge-manager.ts:92:14 
Object
node:internal/modules/cjs/loader:1411 Uncaught Error: Cannot find module 'C:\Users\user\AppData\Roaming\Mailspring\packages\mailspring-avatars\lib\main'
Require stack:
- C:\Users\user\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\package.js
- C:\Users\user\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\package-manager.js
- C:\Users\user\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\app-env.js
- C:\Users\user\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\window-bootstrap.js
- C:\Users\user\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\static\index.html
    at Package.activate (/C:/Users/appveyor/A…rc/package.ts:46:22)
    at PackageManager.activatePackage (/C:/Users/appveyor/A…ge-manager.ts:129:9)
    at /C:/Users/appveyor/A…ge-manager.ts:92:14

Seems like I need to build it with NPM possibly? Can you upload the already compiled plugin?
Note: I am good with computers but dont know even coding basics, but I try...

[DamianB-BitFlipper]

Given Cannot find module 'C:\Users\user\AppData\Roaming\Mailspring\packages\mailspring-avatars\lib\main' it seems like the module installation broke.

I'd recommend, deleting the directory C:\Users\user\AppData\Roaming\Mailspring\packages\mailspring-avatars and, restarting Mailspring, and try re-installing from source.

1. Download my branch here https://github.com/DamianB-BitFlipper/mailspring-avatars/tree/main
2. Then re-install

[technobulb]

Tried that, no luck, same error...

[DamianB-BitFlipper]

To be honest, I think this is an issue with mailspring possibly since the module is not even getting installed. Maybe open an issue on their repo.

[technobulb]

But when I go back and install the old version, it installs fine. Trying to figure out what changes may have caused that...
Thanks for your help!

[DamianB-BitFlipper]

Oh that’s odd. I’m not on Windows and have no way to replicate this. It installs just fine on mac.

…

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On Tuesday, 12/30/25 at 10:23 technobulb ***@***.***> wrote: technobulb left a comment [(Striffly/mailspring-avatars#20)](#20 (comment)) But when I go back and install the old version, it installs fine. Trying to figure out what changes may have caused that... Thanks for your help! — Reply to this email directly, [view it on GitHub](#20 (comment)), or [unsubscribe](https://github.com/notifications/unsubscribe-auth/ABADDDKVOFK3CAK4EMOIXG34EIZA5AVCNFSM6AAAAACP2PDYNKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTMOJYGYZTGNRSGU). You are receiving this because you authored the thread.Message ID: ***@***.***>

[kudlav]

Same here after installing your branch.
Using Windows 11 25H2.
Mailspring 1.16.0

Error: Cannot find module 'C:\Users\Vladan\AppData\Roaming\Mailspring\packages\mailspring-avatars\lib\main'
Require stack:
- C:\Users\Vladan\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\package.js
- C:\Users\Vladan\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\package-manager.js
- C:\Users\Vladan\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\app-env.js
- C:\Users\Vladan\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\window-bootstrap.js
- C:\Users\Vladan\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\static\index.html
    at Module._resolveFilename (node:internal/modules/cjs/loader:1408:15)
    at Module.a._resolveFilename (node:electron/js2c/renderer_init:2:2643)
    at defaultResolveImpl (node:internal/modules/cjs/loader:1064:19)
    at resolveForCJSWithHooks (node:internal/modules/cjs/loader:1069:22)
    at Module._load (node:internal/modules/cjs/loader:1218:37)
    at Module.c._load (node:electron/js2c/node_init:2:18013)
    at Module.s._load (node:electron/js2c/renderer_init:2:31718)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:242:24)
    at Module.require (node:internal/modules/cjs/loader:1494:12)
    at require (node:internal/modules/helpers:135:16)
    at Package.activate (package.ts:46:22)
    at PackageManager.activatePackage (package-manager.ts:129:9)
    at PackageManager.installPackageFromPath (package-manager.ts:218:12)
    at package-manager.ts:163:14
    at AppEnvConstructor.showOpenDialog (app-env.ts:813:5) {pluginIds: Array(0)}

Uncaught (in promise) Error: Cannot find module 'C:\Users\Vladan\AppData\Roaming\Mailspring\packages\mailspring-avatars\lib\main'
Require stack:
- C:\Users\Vladan\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\package.js
- C:\Users\Vladan\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\package-manager.js
- C:\Users\Vladan\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\app-env.js
- C:\Users\Vladan\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\src\window-bootstrap.js
- C:\Users\Vladan\AppData\Local\Mailspring\app-1.16.0\resources\app.asar\static\index.html
    at Module._resolveFilename (node:internal/modules/cjs/loader:1408:15)
    at Module.a._resolveFilename (node:electron/js2c/renderer_init:2:2643)
    at defaultResolveImpl (node:internal/modules/cjs/loader:1064:19)
    at resolveForCJSWithHooks (node:internal/modules/cjs/loader:1069:22)
    at Module._load (node:internal/modules/cjs/loader:1218:37)
    at Module.c._load (node:electron/js2c/node_init:2:18013)
    at Module.s._load (node:electron/js2c/renderer_init:2:31718)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:242:24)
    at Module.require (node:internal/modules/cjs/loader:1494:12)
    at require (node:internal/modules/helpers:135:16)
    at Package.activate (package.ts:46:22)
    at PackageManager.activatePackage (package-manager.ts:129:9)
    at PackageManager.installPackageFromPath (package-manager.ts:218:12)
    at package-manager.ts:163:14
    at AppEnvConstructor.showOpenDialog (app-env.ts:813:5)

[DamianB-BitFlipper]

I have no way to debug this. Could one of you two please undertake investigating this issue?

My fix works on mac perfectly, so there is that to aim for ;)

[technobulb]

Solved. Just needed to be built.
Ideally would be set up with a Github auto-build or whatever, but for now this should work fine for you.
Great job @DamianB-BitFlipper!
mailspring-avatars-main BUILT.zip

[kudlav]

I can confirm it works after compiling.

Ran

yarn
yarn build

Then it works. Thanks ❤️