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Plasmo – A framework for building modern Chrome extensions

202 points| akiselev | 1 year ago |github.com | reply

33 comments

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[+] rahulraikwar00|1 year ago|reply
i personally don't recommend it until they have a well written document as a lot of thing are not clear seems over encapsulated, you have to figure out yourself.. you have a better option you can try WXT (https://wxt.dev/)) also i don't find current scaled project that are using it. soo yh... try break build fix that's what we do
[+] FBISurveillance|1 year ago|reply
I also suggest checking out WXT (https://wxt.dev/) as an alternative (it's also faster using Vite and supports more frameworks).
[+] jazzido|1 year ago|reply
I built an extension for internal company use, using WXT. Fantastic dev experience, great docs, comprehensive examples. Exactly what a framework should do.
[+] deisteve|1 year ago|reply
whoa this is just like plasmo but open source and free ?

what is the difference?

[+] aabhay|1 year ago|reply
If you’re looking for a Vue-flavored dev experience as opposed to a react one, I recommend this:

https://github.com/antfu-collective/vitesse-webext

Building a web extension is pretty straightforward in Vite-land. There are some rough edges around hot reloading, but I doubt it could get that much better.

[+] devvvvvvv|1 year ago|reply
Importantly for anyone who dislikes ads: seems to support Firefox too
[+] thenegation|1 year ago|reply
This information was needed! I had to travel 2 clicks and 5 scrolls to know that. Should have checked your commment :)
[+] creesch|1 year ago|reply
The project might do a better job of explaining what it actually intends to solve. At least as far as the readme.md goes.

I have been active in the area of browser extension development for over a decade now. And to me, it wasn't very clear at first glance.

It isn't crossbrowser extension development (which these days is actually fairly easy if you ignore Safari.... [0]).

The README showcases adding a lot of other frameworks and scaffolding, which to me isn't what makes extension development all that challenging. In fact, using a modern modular approach can be achieved using something like rollup [1].

Of course, I do believe that Plasmo makes setting it all up a lot easier. But just looking at the terminal animation I also can't help but feel that it adds a lot of abstraction I might regret later. To be clear, I also do realize that some people don't mind this and think it is easier to not have to think about the details.

Only when digging a bit deeper into the actually documentation [2] it starts to make more sense to me. From what I gather:

- Manifest creation is done entirely by plasma. You can just declare the thing you want to use or create in the right place like an options page [3]. Which is actually quite neat and something I can see makes things a bit easier for someone freshly starting with extensions. Although I'd argue that the manifest of an extension is not the most complex thing [4], even more when I see that for that with Plasmo you still need to declare similar things just at a different spot [5]

- It provides some scaffolding and abstractions around things like storage and messing between content_scripts and background workers.

- There are some neat utilities available for publishing extensions.

Overall, it looks like it like it does take away the creation of an extension and a lot of the utility functions you would need to write anyway. However it comes at the cost, in my opinion, of extreme abstraction to the degree that a beginner basically will have learned Plasmo and still have next to no understanding of browser extensions themselves.

It's one of those things where I wish this sort of tooling was available around a decade ago but I am also glad that it was not given the knowledge it gained me.

[0] https://news.ycombinator.com/item?id=41043974

[1] https://github.com/toolbox-team/reddit-moderator-toolbox/blo...

[2] https://docs.plasmo.com

[3] https://docs.plasmo.com/framework/ext-pages#adding-the-optio...

[4] https://github.com/toolbox-team/reddit-moderator-toolbox/blo...

[5] https://docs.plasmo.com/framework/content-scripts#adding-a-s...

[+] aflorez|1 year ago|reply
Thank you for this thorough analysis. I've built an extension myself with React and TypeScript an honestly I don't know why I would need an extra tooling to make this work. The docs supplied by Google are quite good!
[+] moi2388|1 year ago|reply
They don’t ignore safari. It creates a bundle for it which you run through Xcode and then it just works perfectly in safari as well.

It’s really a great little framework

[+] kelvie|1 year ago|reply
Tangentially related, I've always wondered why there aren't better frameworks for creating userscripts.

I like customizing websites for various things, but it would be nice if I had some library I can pull into a userscript purpose-built for customizing websites (like adding pop-up config dialogs, in-line boxes to take personal notes / comment on websites, or just tools geared toward injecting and scanning the DOM using mutationobservers).

... or is this that, since userscripts are implemented via browser extensions anyway

[+] hnrodey|1 year ago|reply
Sounds like you're interested in Tampermonkey.
[+] piperswe|1 year ago|reply
Are there any examples of (real, third-party) extensions built with Plasmo?
[+] tbrockman|1 year ago|reply
I’ve built a few using it, for example: https://prune.lol or https://github.com/tbrockman/browser-extension-for-opentelem...

The more I write browser extensions though it seems that there’s not as much benefit to it beyond compiling and bundling everything for you (and the build process does seem to get rather slow rather quickly for me).

The author is pretty open to pull requests and feedback when they have time though!

[+] Jackobrien|1 year ago|reply
Experimented with Plasmo in April and found it super easy to use! Was surprised I hadn’t heard about it until I went looking.
[+] zipping1549|1 year ago|reply
Didn't know eztension framework was a thing
[+] 2Gkashmiri|1 year ago|reply
how do you build a single browser extension and then have compatible firefox/chrome files that are different in what they require for their own thing.

i mean currently we are doing terribly stupid thing. two folders /firefox and /chrome and do the updates manually in both. there should be something easier.

[+] creesch|1 year ago|reply
The only really difference sometimes is in the manifest. If you target the webextension api and use the Mozilla poly fill library, your code base does not need to be duplicated at all.

It adds the benefit of being able to use all API calls in a promise based manner instead of needing to use callbacks.

Edit:

To give it a bit more context (although you can find that in other comments I left under this post).

The polyfill library itself: https://github.com/mozilla/webextension-polyfill

Which if included allows you to swap out `chrome` callback based calls for promise based `browser` calls.

So instead of using `chrome.extension.api.call(() => { // callback})` you do something like `await browser.extension.api.call()` with the same results working in both browsers.

Then the only thing where you still need some separation is for the manifest as some keys are Firefox specific and vice versa.

An example you can find here: https://github.com/toolbox-team/reddit-moderator-toolbox

Where all code lives in one directory and there is just two manifest files, one for chrome and firefox: https://github.com/toolbox-team/reddit-moderator-toolbox/tre...

Building is nothing more than rollup packaging the code and grabbing the right manifest to put in the build directory for each browser: https://github.com/toolbox-team/reddit-moderator-toolbox/blo...

[+] moi2388|1 year ago|reply
https://github.com/PlasmoHQ/plasmo/discussions/803

From my personal experience; most stuff just works cross platform. Currently building an extension and it just works in edge, chrome, Firefox, safari.

You can use poly fill or custom code for when it’s really needed of course

[+] electricduck|1 year ago|reply
This should have really said "WebExtension extensions" instead of "Chrome extensions" as it's a standard across most modern browsers these days
[+] butz|1 year ago|reply
Interesting, that on website there is no mention of building "Chrome extension" only extensions. They should even work on Edge. Was this the result of some unfortunate editorializing of post title?