Send web push notifications to your visitors’ browsers and devices using Firebase Cloud Messaging (FCM HTTP v1). Visitors opt in from the frontend with a single toggle button; from there you can notify them manually, automatically in response to any WordPress or plugin event, or through scheduled and recurring campaigns with click and conversion analytics. There are no subscriber or send limits — nothing here is metered by volume.

Notifications are sent with your own Firebase project: you connect your Google OAuth2 client and your Firebase credentials, and your site talks to FCM directly. No third-party sending service sits in between.

Collecting subscribers

Subscribe/unsubscribe toggle button via shortcode, reflecting its state with subscribed / unsubscribed CSS classes.
Subscription modal whose content comes from a dedicated, translatable custom post type (“Subscription modal templates”) edited with the native WordPress editor — not indexed on the frontend.
All subscription fields are optional and selectable (phone, email, first name, last name). Only the device token is required; an email is needed only if you want to create or link a WordPress user account.
Decoupled feedback messages: a feedback shortcode you can place anywhere, rendered inline, as native WordPress (Gutenberg) snackbar toasts, or both. A JavaScript event is also dispatched for fully custom rendering.
Placement and styling presets for the button and the modal (inline or fixed corners, accent colour, custom classes), with a shortcode builder and live preview in the settings.
Works with any form plugin or custom UI: bind the plugin to your own selectors, or trigger a subscription by dispatching the icfp:external-subscribe JavaScript event.
Resilient subscriptions: device tokens are refreshed automatically when they rotate, renewed subscriptions are recovered by the service worker, and dead tokens are pruned.

Sending notifications

Send screen with a filterable, paginated recipient selector (filter by campaign, location, role, browser/device; select across the whole filtered list) and a rich message composer: title, body, click URL with a page/post picker, icon, badge, hero image, media pickers, live preview, and action buttons that each open their own URL.
Hook-triggered notifications: build notification templates (custom post type) bound to any WordPress or plugin action hook, with dynamic placeholders resolved from the hook arguments. A hook knowledge base and a plugin hook scanner help you find the right event.
Ready-made templates are bundled with the plugin and installed on activation. You can also import a template from a .json file (file picker or drag & drop) from the Push Templates screen; duplicate and near-duplicate templates are detected on import.
Multilingual routing: the subscriber’s language is stored and matched to the template language (Polylang / WPML aware).

Campaigns

Three campaign types: permanent (send on demand), scheduled (one-off, with optional daily/weekly/monthly recurrence), or triggered by a WordPress event.
Audience targeting by user role, by anonymous visitors (subscribers with no account), by language, or by an explicit list of subscribers.
A/B testing: two variants, a configurable audience split, and optional auto-send of the higher-CTR variant to the rest of the audience.
UTM parameters and conversion goals on the click URL, with click and conversion tracking.
Frequency capping: cap how many pushes a subscriber can receive within a rolling window.
Test send to your own devices before sending to the full audience.

Measuring and managing

Campaign Analytics: subscribers, active devices, sent, failed, clicks, CTR, conversions, CVR and unsubscribes, filterable by period, granularity, role and campaign, with CSV export.
Subscribers Map: an optional geolocation captured at subscription time, reverse-geocoded via OpenStreetMap, shown on a map with cascading filters (continent, country, region, postcode, role, browser, device) and a synchronised table.
Subscriber preference center: a frontend page where visitors opt in or out of individual campaigns, subscribe on the spot, or unsubscribe.
Passwordless account link: subscribers with a linked account receive a login link by push (delivered instantly) and, optionally, by email.

Reliable scheduling

Scheduled and recurring campaigns run through WP-Cron, a server crontab, or an external service such as cron-job.org calling the plugin’s cron endpoint.

GDPR-ready

Consent banner: a first-visit banner (on/off, with fully editable and translatable text) asking visitors to accept or decline non-essential campaign-tracking cookies and geolocation capture. Declining never blocks the subscription itself.
Built into WordPress’s own privacy tools: subscriber data is exportable and erasable from Tools Export/Erase Personal Data like any other personal data on your site — no separate privacy plugin required.
Self-service data requests: visitors can request an export or deletion of their own data straight from the subscriber preference center, without needing site-admin access.
Subscribers screen: search any subscriber by phone, email or linked account name and erase them on demand, with the option to also remove their linked WordPress user account.

Developer-friendly

No coding required for the core experience — shortcodes, visual template editors and point-and-click settings get you running. For teams who want to go further:

A public PHP API (ICodePlugins\FirebasePush\API) for sending, managing subscribers and reading metrics.
Authenticated REST routes under icfp/v1 (usable with WordPress Application Passwords) to send notifications, run campaigns, read metrics and manage subscribers.
Actions and filters throughout — icfp_subscriber_recorded, icfp_save_subscriber, icfp_delete_subscriber, icfp_rest_capability, icfp_webpush_urgency, and more.
Fully translatable (text domain matches the plugin slug; an up-to-date .pot is included in /languages; translations are provided via translate.wordpress.org).

Shortcodes

[icodeplugins_firebase_subscribe_btn] — the subscribe/unsubscribe toggle button. Optional attributes: label, class, parent (CSS selector to move the button into), modal (target a specific modal template by ID or slug).
[icodeplugins_firebase_subscribe_feedback] — the feedback region. Optional attributes: class, parent, display = inline (default), toast, or both.
[icodeplugins_firebase_subscribe_assets] — loads the subscription assets on a page that renders its own custom subscribe UI.
[icodeplugins_notification_preferences] — the subscriber preference center.

How it works

Subscriptions are created in the browser using the Firebase JavaScript SDK and a Web Push VAPID key; the resulting FCM device token is stored in your site database, together with whichever optional fields you chose to collect. To deliver a notification, the site authenticates to Google with your own OAuth2 client and calls the FCM HTTP v1 API.

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External services

Web push cannot work without a push service: the browser vendors require one, and this plugin uses Google Firebase Cloud Messaging (FCM), with the Firebase project you own and configure. Two further services (OpenStreetMap) are used only by the optional Subscribers Map.

This plugin connects to the following third-party services.

1. Firebase Cloud Messaging — HTTP v1 API (Google)
Hosts: https://fcm.googleapis.com
What it is / why: the push service that actually delivers notifications to your subscribers’ browsers. It is required for the plugin to send anything at all.
Data sent, and when: every time a notification is sent (manually, by a campaign, or by a hook-triggered template), the plugin sends the message content (title, body, icon/badge/image URLs, click URL, action buttons) together with the recipient’s FCM device token. No other subscriber data (email, phone, name, coordinates) is ever sent.
Terms of service: https://firebase.google.com/terms/ — Privacy policy: https://policies.google.com/privacy

2. Google OAuth 2.0 / Google APIs (Google)
Hosts: https://accounts.google.com, https://oauth2.googleapis.com, https://www.googleapis.com
What it is / why: authenticates your site to your own Firebase project, so it can call the FCM API above.
Data sent, and when: when the administrator clicks “Connect Google Account” (browser redirect to Google), then whenever an access token must be issued or refreshed before a send, and once more if the administrator clicks “Disconnect” (token revocation). Only your own OAuth client ID/secret and the authorization/refresh tokens are exchanged. No subscriber data is involved.
Terms of service: https://policies.google.com/terms — Privacy policy: https://policies.google.com/privacy

3. Firebase JavaScript SDK (Google)
Hosts: https://firebaseinstallations.googleapis.com, https://fcmregistrations.googleapis.com (contacted by the SDK; the SDK files themselves are bundled with the plugin and served from your own domain).
What it is / why: runs in the visitor’s browser and in the service worker to register the browser with FCM and obtain the device token that identifies it.
Data sent, and when: only when a visitor chooses to subscribe (and afterwards, if the browser rotates the token). The browser sends your Firebase project identifiers, your Web Push VAPID public key and the browser’s push subscription details to Google. Nothing is sent for visitors who never subscribe.
Terms of service: https://firebase.google.com/terms/ — Privacy policy: https://policies.google.com/privacy

4. Nominatim — reverse geocoding (OpenStreetMap Foundation)
Host: https://nominatim.openstreetmap.org
What it is / why: turns the coordinates a subscriber agreed to share into a readable address (country, region, postcode) for the optional Subscribers Map.
Data sent, and when: only if a visitor explicitly grants the browser’s location permission when subscribing. The plugin then sends those coordinates (latitude/longitude) and an identifying User-Agent, once per subscriber. If permission is denied — or the browser prompt is dismissed — nothing is collected and nothing is sent. No personal detail (email, phone, name, device token) is sent.
Terms of service: https://osmfoundation.org/wiki/Terms_of_Use — Nominatim usage policy: https://operations.osmfoundation.org/policies/nominatim/ — Privacy policy: https://osmfoundation.org/wiki/Privacy_Policy

5. OpenStreetMap map tiles (OpenStreetMap Foundation)
Host: https://tile.openstreetmap.org
What it is / why: supplies the background map images of the Subscribers Map screen. (The map library, Leaflet, is bundled with the plugin — it is not loaded from a CDN.)
Data sent, and when: only when an administrator opens the Subscribers Map admin screen, and only what any image request carries — the administrator’s IP address and browser user-agent. No visitor or subscriber data is sent. No tile is requested on the front end.
Tile usage policy: https://operations.osmfoundation.org/policies/tiles/ — Privacy policy: https://osmfoundation.org/wiki/Privacy_Policy

Privacy and consent

The plugin does not track visitors, does not profile them and contains no analytics. Nothing is collected from a visitor who does not subscribe.
Subscribing is always an explicit action: the visitor clicks the subscribe button and then grants the browser’s own notification permission.
Geolocation is opt-in twice: the feature is optional for you, and the visitor must grant the browser’s location permission. Refusing changes nothing else — the subscription still works.
The subscriber’s browser/device (from the user-agent) is recorded on your own server to display it in the Subscribers Map. It is never sent to a third party.
Subscriber details (email, phone, name, coordinates, addresses) are stored on your own site only, in your own database, and are deleted with the plugin’s data when you uninstall it.
Clicks and conversions are counted per campaign for your analytics; they are stored on your site only.

Please make sure your site’s privacy policy reflects the use of Firebase/Google (and OpenStreetMap, if you enable the Subscribers Map).

Read the full documentation

Included in the Pro version:

Set the push notification service in 2 clicks
Real Linux CRON jobs for reliable delivery in a couple clicks
Download and share push notification templates

NotifReach: Push Notifications