docs: add README with install instructions for both browsers

README.md

@@ -0,0 +1,91 @@
+# ISMIS Helper
+
+A lightweight **[Firefox](https://addons.mozilla.org/)** / **[Chrome](https://chromewebstore.google.com/)**
+extension for the USC ISMIS student portal that:
+
+- Auto-fills and auto-submits your login.
+- Auto-accepts the privacy-policy modal.
+- Exports a **Study Load PDF** that matches the official layout — bundled **Segoe UI**
+  fonts, the USC logo, the course table, and the units total.
+
+One codebase builds for **both browsers** (see [Build](#build)).
+
+## Features
+
+- **Saved login profiles** (stored in `browser.storage.local`) — only one enabled at
+  a time, with a master on/off toggle.
+- **One-click Download PDF** button on the Study Load page.
+- PDF settings in the popup:
+  - Truncate long course descriptions to match the official PDF (default on).
+  - Show/hide `Year Level`, and set a custom Year Level value.
+- **Bundled Segoe UI fonts** for a 1:1 look with the official document.
+- Builds and packages automatically via Gitea Actions (zips + versioned releases).
+
+## Install
+
+> Temporary/development install. For distribution, publish the built zips to
+> Firefox AMO and the Chrome Web Store — they are store-ready.
+
+### Firefox (load temporary add-on)
+
+1. Build the Firefox variant (or download `ismis-helper-firefox.zip` from CI):
+   ```bash
+   node scripts/build.js firefox
+   ```
+   The output is at `dist/ismis-helper-firefox.zip` (unzip it, or use `dist/firefox/`
+   directly).
+2. Open `about:debugging` in Firefox.
+3. Click **This Firefox** → **Load Temporary Add-on…**.
+4. Select `dist/firefox/manifest.json`.
+5. Open `https://ismis.usc.edu.ph` and use the extension.
+
+### Chrome (load unpacked)
+
+1. Build the Chrome variant (or download `ismis-helper-chrome.zip` from CI):
+   ```bash
+   node scripts/build.js chrome
+   ```
+2. Unzip `dist/ismis-helper-chrome.zip` (or use `dist/chrome/` directly).
+3. Open `chrome://extensions` in Chrome.
+4. Enable **Developer mode** (toggle, top-right).
+5. Click **Load unpacked** and select the unzipped `dist/chrome` folder.
+6. Open `https://ismis.usc.edu.ph` and use the extension.
+
+> For a persistent install, package and publish via Firefox AMO / Chrome Web Store
+> with the same built zips.
+
+## Build
+
+Requires **Node.js** (the `build.js` script itself is dependency-free; `npm install`
+is only needed to run the tests).
+
+```bash
+npm install                     # dev deps for tests
+npm test                        # run the test suite
+npm run build                   # build both -> dist/*.zip
+node scripts/build.js all       # build both explicitly
+node scripts/build.js chrome    # just chrome
+node scripts/build.js all --version 1.3.0   # versioned zips
+```
+
+**CI (Gitea Actions):** on every push, both zips are built, tests run, and the
+zips are uploaded as artifacts. When you push a `v*` tag (e.g. `v1.3.0`), it
+additionally creates a **Gitea Release** with both versioned zips attached.
+
+## Settings
+
+Open the extension popup to:
+- Manage login profiles (add / edit / enable).
+- Toggle the master on/off switch.
+- Set PDF options: truncate descriptions, show/hide `Year Level`, custom Year Level.
+
+## Data & privacy
+
+- Auto-login stores your portal credentials **in plaintext** on your own device.
+- This is a personal-use helper for the university portal; use it only with your
+  own account.
+
+## Development
+
+See [`AGENTS.md`](AGENTS.md) for the repository layout, build model, and coding
+conventions for this project.